Blueberry Raspberry/Mr Blue Hayati Pro Ultra Plus 25K Pods

One pod, £7.99, two flavours inside it. The first thing to get straight is that this is not a two-pack. Nobody is sending you a Blueberry Raspberry pod and a Mr Blue pod in the same box. What arrives is a single Hayati Pro Ultra Plus refill carrying 22ml of 20mg nicotine salt, divided between two reserves that Hayati keep stored separately, with a rotating mouthpiece section deciding which of them feeds the coil. One coil serves both. Hayati put a figure of 25,000 puffs against the pod, produced in a laboratory on test equipment rather than by anyone drawing on it, so read it as a workload figure for that single sealed coil rather than a quantity of days. No device is in the packet, and £11.99 buys the same two reserves with a device attached as the Blueberry Raspberry / Mr Blue Hayati Pro Ultra Plus 25000 Prefilled Pod Kit.

Now the part that actually decides whether this listing suits you, and it has nothing to do with hardware. Look at the two names. One is a recipe: Blueberry Raspberry tells you the fruit, the order of the fruit and roughly what the draw will do. The other declares nothing. Mr Blue is a colour and a title, with no fruit attached to it anywhere in the product data.

That gap has a consequence product pages never follow through. In a pack built this way, one half is the reason the purchase happened and the other came along with it, and here the imbalance is about as stark as the format allows, because only one of the two halves can be understood before the packet is open. Almost nobody adds this pod to a basket because of Mr Blue. They add it for Blueberry Raspberry, and Mr Blue is the passenger.

What makes the passenger interesting is not that it is hard to get at. It is a second away. The collar turns, it turns back, and it costs nothing at any point in the pod's life. And yet the reserve nobody chose routinely goes unvisited for weeks by people who could have tried it a hundred times over while waiting for a kettle to boil. That is stranger than simple neglect, and it is what the rest of this page is about: why a half costing one second to reach stays unreached, what that costs, how to give it a fair hearing, and whether the hearing earns its keep.

The half that made the sale, and the half you keep declining

Two names doing completely different jobs

Product names in this range mostly work as specifications. Lemon and lime means lemon and lime. Blue Razz Cherry tells you a cherry has been folded under a blue raspberry. Mr Blue breaks the convention: it belongs to a small group of Hayati house labels pointing at a colour rather than an ingredient, and the whole of what the catalogue commits to is that it sits in blue-fruit territory and reads as an all-round blue profile rather than a literal pairing of two named berries. That describes a category, not a recipe. No criticism of Hayati is intended, and they sell Mr Blue quite happily as a single-flavour Pro Ultra Plus pod at the same £7.99.

The effect shows up at the moment of choosing. Fifty-two pods on the shelf, one price, and only the titles separating them, so a title that answers your question wins and a title that raises one loses. This pod sells on Blueberry Raspberry, a combination repeated across every hardware family Hayati make for a sound reason: blueberry brings weight and no sharpness, raspberry brings sharpness and no weight, and each covers the other's shortfall. Almost nobody dislikes it, which is precisely the quality that closes a sale. Mr Blue contributes the impression that the box holds more than one thing, which makes £7.99 feel like better value than the same money on a single flavour, although the volume is identical either way.

None of which means the passenger is poor liquid. It means the passenger was never assessed. Those are entirely different findings and they get confused constantly.

Why a second is too long

The collar is not a barrier. Turning it takes about as long as reading this sentence, and turning it back takes the same. Nothing about the mechanism explains why the unchosen reserve sits untouched, and if you ask somebody two weeks into a pod why they have not tried the other side, the honest answer is usually that no reason exists. They did not decide against it. They never arrived at a moment where turning it occurred to them.

A collar is a switch with a resting position, and the resting position is wherever it was last left. On day one you set it to the half you bought the box for, which is entirely rational. Every draw after that re-elects the same setting without a vote being held. The passenger does not lose a contest. No contest takes place. Part of the reason is when the device gets picked up: almost nobody reaches for one at a moment of deliberation, and a selector only gets operated by somebody paying attention to the product. The collar is an interface for a state of mind the buyer is almost never in.

Compare the same neglect on a pairing split by temperature, such as Blue Razz Pineapple / Strawberry Ice. There the unchosen half advertises itself, because the moment your setting stops satisfying you the thing you want is cold and you know there is cold in the pod. Same collar, same second. The difference is that the other reserve has a claim on your attention. Here both reserves are blue fruit, so the passenger has nothing to interrupt you with, and an option that never interrupts is an option that never gets exercised.

The two moments the passenger does get tried, and why both are unfair

It is not quite true that nobody turns the collar. Almost everybody turns it twice, and the two occasions are so badly chosen that between them they produce a worse picture than turning it never would.

The first is curiosity, in the opening hour. Two problems. The chamber above the coil is still full of what you were drawing a minute ago, so you taste a mixture rather than a sample. And you are in a receptive, novelty-seeking frame of mind, which produces an unfairly warm reading of almost anything. The two errors point in opposite directions, so the impression is not merely inaccurate but unpredictably so.

The second is boredom, somewhere in the pod's final stretch. The flavour you chose has gone quiet and you remember there is another one in there. By now the coil has been processing sweetened liquid for a fortnight or more, and mesh residue does not accumulate evenly across a profile: it buries quiet elements well before loud ones, so high notes, dry edges and anything at the back of the finish go first while plain sugar survives. The passenger arrives with exactly the components that would have distinguished it already filtered out, and the verdict comes back almost verbatim every time: much the same, only sweeter. That verdict is then carried forward as a finding about the flavour, when much of it is a finding about the state of the mesh on the day of the test.

The loop that makes you more certain the longer you are wrong

Those two points feed each other, which is what makes the asymmetry self-sealing rather than merely unfortunate. The more you use the chosen half, the more residue goes onto the shared coil. The more residue, the worse the passenger shows whenever you eventually get round to it. The worse it shows, the more confident you become that you chose correctly, and the less reason you have to turn the collar again. Confidence rises while the quality of the evidence falls, and nothing in the process feels like an error at any point.

That is how a buyer goes through this listing two or three times and still holds no real opinion on half of the liquid. Not through carelessness, but through a sensible-feeling routine that quietly makes itself unfalsifiable.

What the unvisited reserve costs, in plain money

Worth stating once, without dressing it up. Hayati publish the total volume and not the division between the reserves, so an even split is a working assumption rather than a fact. Take it as around eleven millilitres a side.

Eleven millilitres you never draw on is not liquid saved. There is no way to move it, decant it or hold it back, the coil is sealed in and serves both sides, and when the mesh reaches the end of its working life the pod is finished with everything still inside it. On a £7.99 purchase, an untouched reserve is somewhere around four pounds going into the recycling with the pod. Buy the pairing three times without turning the collar and about twelve pounds has gone on liquid that never reached your mouth. That is not an argument against dual pods. It is an argument against owning one and treating it as a single, which is what the default-lock quietly turns it into.

The passenger is not automatically the lesser half

The correction that stops this being one-sided: the half that made the sale is not the same thing as the better half, and on this pack there is a decent case for the reverse.

Blueberry Raspberry's great strength is that it is predictable. Tasting it confirms an expectation rather than teaching you anything, which is worth a great deal at the moment of purchase and steadily less afterwards, because predictability is also what lets a flavour fade into the background fastest. Mr Blue has the opposite shape. It is the half you cannot predict, a liability on a shelf and an asset once the pod is yours. Whatever capacity this box has to tell you something is invested entirely in the reserve you did not choose, and the default-lock means it is also the reserve you are least likely to reach. A flavour can win the shelf and then win every subsequent draw by default, and neither of those is winning on merit.

Scarcity points the same way. Blueberry Raspberry is everywhere: a shelf of its own with thirty-nine listings across the formats, a single-flavour pod in this exact format at the same price, and a smaller Rubik version at £3.99. Mr Blue is not everywhere. Its own shelf runs to thirteen products, a third the size. The half you bought the box for is the commodity, available in any quantity and format you like. The half sitting behind an unturned collar is the scarcer one, and you are already holding roughly eleven millilitres of it.

The two reserves, described honestly

Blueberry Raspberry, the reserve you can predict

Set the collar here and nothing will surprise you, which is rather the point. The draw opens on the raspberry, an acid line arriving early and sitting fairly high and narrow. It does not read as sour the way a deliberately soured liquid does. It reads as fruit sharpness, the kind that registers in the jaw before the tongue has finished with it.

Underneath and slightly behind that, the blueberry supplies body: soft, dark and rounded, with a sweetness behaving more like syrup than like sugar crystals, and almost no edge of its own. Paired with the raspberry it becomes the thing holding the acid up, and together they give a draw with a defined top and a defined bottom and not much argument in the middle. The exhale runs warm and stays a while, since no cooling appears on this listing, so the sweetness decays rather than being cut off. Overall it sits above the midpoint of what this range sells without arriving at the sweet-counter register.

Read that back and notice every sentence could have been written before the pod was opened. That is what the half that makes the sale is like: known, competently built, doing exactly what the name promised.

What can honestly be said about Mr Blue, with the confidence marked

Rather than invent a tasting note for a liquid whose composition is unpublished, here is the reasoning with its confidence labelled. Where an inference is being made, it is flagged as one.

Reasonably confident. It is uncooled. No ice, menthol or coolant is listed against either reserve, and cooling is the one element manufacturers reliably declare because buyers filter on it. Both sides run warm. It is also sweetened rather than dry, since essentially everything in this format is and nothing marks this listing as an exception.

Probable. It leans towards the confectionery reading of blue rather than the fruit-bowl reading. The reasoning: a name committing to a colour instead of a fruit is usually attached to a blend not derived from one identifiable fruit, and the flavour occupying the colour blue in this trade without belonging to any particular berry is the sugared blue raspberry note. That is an inference from naming convention rather than a fact from a specification, and it should be held loosely.

Unknown, and it is the axis that decides the purchase. Whether Mr Blue carries any acid of its own. That single question settles whether the collar gives you two genuinely different draws or one idea at two depths, and nothing published answers it. If Mr Blue has a sharp edge, the collar is a real switch. If it is all body and no edge, turning it removes the raspberry and leaves the soft part of the profile standing alone, which is a change of intensity rather than of subject.

Anybody for whom that distinction decides the purchase should not buy a pairing to find out. Buy a pod with the fruit printed on it: Blueberry Raspberry Lemon puts a declared citrus over the same berry base, and Blue Razz Cherry / Blue Razz GB gives two blue raspberries whose difference is stated in the title.

What is on the record, and what is not

Worth separating cleanly, since everything above depends on knowing which is which.

Stated by Hayati against this listing:

• Two flavours in one pod, stored separately, chosen by a rotating mouthpiece.
• 22ml of prefilled liquid in total, at 20mg nicotine salt, with no other strength offered.
• A manufacturer rating of 25,000 puffs, which is a laboratory measurement.
• A compatible Pro Ultra Plus device is required and is not supplied.
• That Mr Blue sits in blue-fruit territory and is not a literal two-berry mixture.

Not stated anywhere, and not inferable from anything published:

• Which fruit or fruits Mr Blue is built from, or whether one dominates.
• How sweet Mr Blue is relative to Blueberry Raspberry.
• How the 22ml divides between the two reserves.
• How the pod keeps the two liquids apart internally. No valve, seal or flow detail is published, and none is assumed here.
• Coil resistance, wattage, airflow figure or wick material.
• Whether Mr Blue here is formulated identically to Mr Blue in any other Hayati range.

That last one is the gap most likely to catch somebody who believes they have already solved the problem. The Mr Blue name appears in more than one Hayati range, and nothing in the product data says the recipe carries across unchanged between formats, so a tasting note borrowed from a different device is a guess wearing the clothes of a fact.

What neither reserve is

• Not cooled. Nothing here carries ice, menthol or a coolant, so both finishes run warm. If cold matters, Fresh Mint / Blue Razz Mint puts it on both sides.
• Not sour. The raspberry brings sharpness, not acid as a headline.
• Not a drinks profile. Blackcurrant Lemonade is where fizz lives in this format.
• Not a wide pairing. Both halves are blue fruit, so whatever separates them operates inside one fruit family, which is the root of everything described above.
• Not adjustable. One strength, one pairing, one fixed division of liquid.

The pod, briefly, and the one part that governs all of this

Little needs saying about the hardware, since you own it already and this listing is the consumable. One sealed pod arrives, prefilled, with liquid already against the wick. Nothing to prime, nothing to fill, nothing to assemble. It seats in a compatible Pro Ultra Plus, not supplied here, and that absence is the whole of the price gap between this listing and the kit. Hayati publish no compatibility chart against this pod, so the sound working rule is to match the range name on your device to the range name in the title rather than assuming a similar-looking pod from another Hayati range belongs in it.

The part that matters is the rotating mouthpiece and what sits under it. Turning the collar selects which reserve reaches the chamber above the coil. Hayati state the two flavours are stored separately; how the pod achieves that is not published, and nothing here assumes a mechanism. What the specification does make certain is that one coil serves both, and a practical consequence follows: draws taken immediately after a switch are still pulling on what the previous reserve left in the chamber. A handful of pulls taken on a whim to see what the other side is like is not a sample of the other side. It is a sample of a carryover, and most casual verdicts on passenger halves are formed exactly there.

What Hayati leave unpublished for this pod is a longer list than what they publish: no coil resistance, no wattage, no airflow figure, no division of the 22ml, no parts breakdown. Since no device ships in this packet, nothing about batteries or charging arises at all, and any page telling you otherwise is filling a gap rather than reporting one.

The specification, and the row that refuses to say anything

Listing	Blueberry Raspberry/Mr Blue Hayati Pro Ultra Plus 25K Pods
Price	£7.99
Format	One prefilled refill pod. Not a two-pod pack.
Device	Not included. Requires a compatible Hayati Pro Ultra Plus.
Total liquid	22ml, prefilled, shared between two reserves
Division between reserves	Not published by Hayati
Reserve named by ingredient	Blueberry Raspberry
Reserve named by colour only	Mr Blue
Choosing between them	Rotating mouthpiece section
Strength	20mg nicotine salt, no alternative listed
Cooling	None declared on either reserve
Coil	One, sealed in the pod, serving both reserves, not serviceable
Manufacturer puff rating	25,000, a laboratory measurement by Hayati
Maker	Hayati

Two rows are worth reading against each other, and they are the two flavour rows. One names fruit. The other names a colour and a title. Every remaining line applies equally to both halves, which means the entire published distinction between the reserves is the difference between a recipe and a placeholder. The asymmetry this page is about has not been imposed by a writer. It is printed on the label.

The division row is blank deliberately. Hayati give the total volume and not the split, and it would be easy to write eleven and eleven in as though it were established. Two reserves in a 22ml pod makes an even division the obvious reading, and an obvious reading is still a reading. Where the specification is silent, the table says so.

The coil row does the most work on this page. A single element serving both reserves is what makes the two halves share a history: every draw taken on one side is also a draw taken against the condition in which the other will eventually be tasted. On a pod with two coils that would not be true and none of the argument above would apply.

The 20mg figure is a concentration and nothing more. Nicotine is addictive, the strength here is fixed with nothing else offered, and which strength anybody uses is a decision for the buyer rather than for a retail page. The 25,000 figure comes off a machine drawing at a fixed rhythm under fixed conditions, which makes it reasonable for ranking products and close to useless for predicting your own week. Read as workload it says more: one non-replaceable coil is expected to process the whole 22ml, both reserves included.

Giving the passenger a fair hearing

The case above is that the second half of this pod is systematically under-assessed, not by accident of scheduling but because a default setting never gets overridden. The remedy has to work with that rather than against it. Resolving to turn the collar more often does not work, and anybody who has tried it knows why: the moment at which you would need to remember is a moment when you are not thinking about the pod at all.

Give the passenger the first draw of the day. This is the whole method and everything else is detail. Set the collar to Mr Blue at night, before the device goes down, while you are still paying attention to it. The next morning the first draw lands on the unchosen reserve without any decision being required, because the default-lock that caused the problem now works in your favour. It is the one moment in the day when a deliberate act is easy, and it is also, usefully, the moment the palate is least cluttered.

Do not read the first draw. The chamber above the coil still holds whatever was there when you put the device down, so the opening pull of the morning is carryover rather than a clean read. Take half a dozen unhurried draws before forming any impression. The overnight version is better than a mid-session switch because the interval is long, but it does not remove the carryover, and anybody judging the very first draw is judging a mixture.

Then leave it. Do not turn it back at the first opportunity. Let the morning run on that side, and preferably the day. Three or four unbroken days produce something worth acting on and a week is better. That sounds like a lot to give a flavour you did not pick, until you remember you have already bought it.

Do it on a new pod if you can. The coil is at its cleanest on day one and never returns to that condition, so running the hearing early means the quiet parts of the profile, the parts capable of separating one blue fruit from another, are still there to be found. A hearing held in the pod's last week is held through a filter.

Ask a purchase question, not a ranking question. The instinctive test is whether Mr Blue beats Blueberry Raspberry, and it is the wrong one, because a comparison against the half you chose is rigged by everything that made you choose it. Ask instead: would I spend £7.99 on 22ml of this alone? That produces a decision rather than an opinion, and it maps onto a product that exists, since Mr Blue is sold by itself in this format at exactly that price. Decide in advance what a yes looks like, too, because a standard set afterwards gets set in the light of the answer.

Count the turns. The simplest diagnostic here. If a fortnight goes by and you have turned the collar twice, both times out of curiosity, the pairing is not functioning as a pairing for you, whatever you think of either flavour. That is a finding about the format rather than the liquid, and it argues for single-flavour pods regardless of which side wins.

Run the name test at the end. Ask whether you would have bought this box with the names printed the other way round, Mr Blue as the headline. If yes, the pairing is genuinely working and the labelling was incidental. If no, the £7.99 has been buying one flavour and a garnish.

Is the hearing worth holding?

Yes on the first pod, no thereafter, because the cost is almost entirely front-loaded. It costs a few days of a flavour you did not choose, on liquid already paid for, with the collar available at any moment if it turns out to be unpleasant. It buys a decided half instead of an undecided one, and that decision routes everything you buy next. Without it you stay where this page started: capable of going through the pairing three times, holding no view on roughly half of it and binning about four pounds a pod.

The counterargument deserves its say. On this pairing the odds of the passenger being a revelation are not high. Both halves are blue fruit, Hayati describe them as two takes on one shade, and a pairing built that narrow is unlikely to be hiding something startling.

That is a reason to expect a modest result, not a reason to skip the test. Learning that Mr Blue is a plainer, sweeter version of the same idea tells you the collar is buying you nothing, and a single-flavour pod is then the better use of the money. Learning that it carries an edge of its own is worth more, because it opens a shelf you have never shopped. And the outcome people underrate is discovering you slightly prefer the half you never chose, which happens often enough to justify the week and would otherwise never surface, because the mechanism hiding it is the same one that would go on hiding it.

Where the verdict sends you

Four outcomes, each with a different next purchase attached. This is the part of the page worth returning to once you have an answer.

If Mr Blue wins

Stop buying it as a passenger and buy it as a product. Mr Blue Hayati Pro Ultra Plus Pods is the same £7.99 with the whole 22ml behind one profile, which roughly doubles the quantity of the thing you now know you want and takes the collar out of the equation entirely. The Mr Blue shelf is small enough to read end to end in a minute, and it is the only place the name is gathered across formats.

A win here is a signal about what you like rather than about one pod. If the appeal turned out to be the sweet, colour-led blue register rather than a recognisable fruit, the confectionery listings are the natural direction: Blue Razz GB Hayati Pro Ultra Plus Pods states that register openly, Blueberry Cotton K / Raspberry Cotton K applies a spun-sugar treatment to two berries, and Blackcurrant Cotton K / Blue Raspberry sets a sweet-shop half against a plainer fruit one. Blue Razz GB Hayati Rubik Pods at £3.99 test the idea before you commit 22ml to it.

If Blueberry Raspberry wins

Then the pairing has done its job and told you something, and the move is to stop paying for a reserve you have now formally declined. Blueberry Raspberry Hayati Pro Ultra Plus Pods puts the full volume behind the blend at the same price, with no collar to think about and nothing left over at the end. To commit less per purchase, the same blend appears in the smaller Rubik format at £3.99.

A win for the base also tells you which way to move when it goes quiet, which it will, since a warm uncooled berry recedes into the background faster than a busier profile. Keep the berry and change what sits over it. Blueberry Raspberry Lemon adds a citrus counterweight this pod has no version of, Blueberry Raspberry / Blueberry Raspberry Cherry deepens the same base, Blueberry Raspberry Cherry Hayati Pro Max Plus Pods at £5.49 is the three-fruit version standing alone for a Pro Max Plus, and Blackberry Raspberry swaps the soft blue fruit for a darker one while keeping the sharp element.

If the two halves turn out to be near neighbours

Entirely possible, and probably the single most likely outcome given how narrowly the pairing is built. If several days on each side produce two accounts you cannot separate, the collar is decoration and you have been carrying a two-position switch for no return.

The correction is not to abandon dual pods but to buy one whose sides were designed to disagree. Fresh Mint / Blue Razz Mint separates its halves by how much fruit sits over a shared cooling, Blue Razz Pineapple / Strawberry Ice puts cold on one side only, and Grape GB / Blue Razz GB keeps one confectionery treatment while changing the fruit beneath it. Any of those gives the collar a reason to be turned, which is the property this pairing lacks.

If the register is the problem rather than either half

Sometimes the hearing returns a verdict on the whole pod: both halves fine, both sweet, and sweetness itself is what you have had enough of. Strawberry Raspberry Ice keeps a sharp berry and adds the cold finish this pod has no access to. Strawberry Watermelon Hayati Pro Ultra Plus Pods moves to a lighter, more watery pair at the same volume and price. Blue Razz Cherry Hayati Pro Ultra Plus Pods stays blue while putting a darker fruit underneath, which reads drier at the back of the draw than a straight berry blend.

Browsing from here

The Pro Ultra Plus pods shelf holds all fifty-two refills in this format at one price, which makes rotating within it a decision about taste and nothing else. The wider Pro Ultra Plus range adds the kits. Blueberry Vapes runs to ninety listings and Berry Vapes to two hundred and twenty-five, so both are best used with a fruit already in mind, and the complete Hayati range is there when nothing above fits.

Practical notes for a pod with an unexamined half

General pod handling is covered well enough elsewhere. These are the habits that matter when half of what you are holding has never been properly assessed.

Do not restock until you have a verdict. Buying the same pairing again while half of it remains unexamined is how somebody ends up three purchases deep with an opinion on one flavour and a running total of binned liquid. One pod at a time until the question is settled, then buy against the answer.

Slow the draws down during the hearing. Quick successive pulls leave a coating that flattens the tail of whatever follows, and the tail is where an unfamiliar profile does most of its distinguishing. If Mr Blue has anything quiet in it, rapid drawing is the surest way to miss it and then conclude there was nothing there.

Read a reserve going quiet as a coil signal. Because one element serves both sides, a flavour fading is more often the mesh than the liquid. If turning the collar produces no change in either direction, the coil has reached the end of its working life and the pod is finished, whatever remains inside. Carrying on past that point only puts more heat through sweetened liquid.

Expect to throw some away, and decide whether you mind. A pod with a half you never chose is more likely than most to be retired part-full, and on a £7.99 purchase that is real money going out with the packaging. The only thing that reduces it is the hearing, because a passenger you have decided about is either one you now use or one you know to stop buying.

Store spares dark, upright and at ordinary room temperature, somewhere children and pets cannot reach them. Heat and light dull the delicate parts of a sweet profile first, which here means the raspberry edge and whatever quiet detail Mr Blue turns out to hold. A pod that has spent a fortnight on a windowsill is a poor subject for any comparison.

Retire it properly. A finished pod still holds a coil and a film of liquid, so it belongs at a vape retailer or a recycling point rather than in household waste.

Questions people ask about this pairing

Does this listing contain two separate pods?

No. It is one pod holding 22ml divided between two reserves that Hayati store separately, with a rotating mouthpiece choosing which one feeds a single shared coil. You are buying one consumable with two settings rather than a pair of pods.

What fruit is Mr Blue?

Hayati do not say. The product data commits to blue-fruit territory and states that it is not a literal two-berry mixture, and that is the whole of what is published. Anyone quoting a specific fruit is inferring rather than reporting, and this page will not add to that.

Why do I never turn the collar?

Because it holds whatever position you last left it in, and nothing about the other reserve interrupts you to ask for a turn. Both halves here are blue fruit, so the unchosen side has no distinct claim on your attention the way a cold half would. The setting re-elects itself with every draw and no decision is ever consciously made.

What happens to the side I never use?

It goes in the bin with the pod. There is no way to decant it, transfer it or keep it back, and the shared coil determines when the pod is finished regardless of what is left inside. Hayati do not publish the division of the 22ml, but on an even reading an untouched reserve is roughly four pounds of a £7.99 purchase.

Can I just take a few draws of the other side to see what it is like?

You can, but it tells you very little. The chamber above the coil still holds the previous liquid, so the first several draws after a switch are a carryover mixture. Give it half a dozen unhurried pulls before forming any impression, and considerably longer than that before forming a verdict.

Which side should I start a new pod on?

Mr Blue, if you want a usable opinion on it. The coil is cleanest at the start and never returns to that state, and the quiet elements that would distinguish one blue fruit from another are the first to go as residue builds. Blueberry Raspberry is the known quantity and loses almost nothing by waiting.

Do I get 22ml of whichever flavour I prefer?

No. The 22ml covers both reserves together and Hayati do not publish the split, though an even division is the sensible working reading. A single-flavour pod at the same price is the only way to put the whole volume behind one profile.

Is Mr Blue here the same as Mr Blue in other Hayati ranges?

Not stated anywhere. The name appears in more than one format and nothing in the product data confirms the recipe carries across unchanged, so a tasting note borrowed from a different device is a guess. Treat each listing as its own product until something published says otherwise.

What does the 25,000 rating actually tell me?

It is Hayati's own laboratory figure, generated by a machine drawing at fixed intervals, which makes it reasonable for ranking products and poor for forecasting your own fortnight. Read as workload it is more useful: one sealed coil is expected to process the whole 22ml, both reserves included, with no option to replace it partway.

Can I choose a different nicotine strength?

No. This pairing is listed at 20mg nicotine salt with nothing else offered, so the strength is fixed by the product. Nicotine is addictive, and what strength to use is a decision for the buyer rather than something a product page should steer.

The short version

A single Pro Ultra Plus refill pod at £7.99, holding 22ml of 20mg nicotine salt across two separately stored reserves selected by a rotating mouthpiece and served by one sealed coil, rated by Hayati in a laboratory at 25,000 puffs. No device is included. Blueberry Raspberry is a sharp raspberry over a soft, syrupy blueberry, warm throughout and thoroughly predictable. Mr Blue commits to a colour and no fruit, which makes it the only part of this box capable of telling you something you did not already know.

The argument has been that the unchosen half is not neglected because it is out of reach. It is a second away at every moment of the pod's life. It goes untried because the collar holds its last position and nothing about a second blue fruit interrupts you enough to move it, so the half that won on the shelf goes on winning by default, on a coil it is steadily ageing, until you finally turn the collar and find the evidence spoiled. The unused reserve then goes in the bin with the pod, which on an even division is something like four pounds of the price.

The remedy costs a second a day. Set the collar to Mr Blue before the device goes down at night, ignore the first draw of the morning because it is still carryover, leave it there several days, and ask whether you would buy 22ml of it alone rather than whether it beats the flavour you chose. Expect a modest answer, since both halves are blue fruit and the pod was never built for contrast. Take it anyway: it turns an unexamined half into a decided one, and whichever way it falls, the next £7.99 goes somewhere you actually chose.

Strictly for adults aged 18 and over. Nicotine is an addictive substance.