Instamax Instaflow 20k Prefilled Vape Device Box of 5 Strawberry Blue Razz

Overview

The Instamax Instaflow 20k Prefilled Vape Device Box of 5 Strawberry Blue Razz by Instamax in Strawberry Blue Razz at 0mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.

Instamax Instaflow 20k Blueberry Razz Lemon: What the Box of 5 Is

Instamax Instaflow 20k Prefilled Vape Device Box of 5 Blueberry Razz Lemon is a multipack of five prefilled vape devices in a single fruit flavour, priced at £49.29 for the box. That works out at roughly £9.86 per device, and every unit in the box carries the 20k rating (20,000 puffs, as stated by the maker) that gives the Instaflow line its name. The flavour is a three-part fruit blend built around blueberry, raspberry (the 'razz' in the name) and lemon, and it sits in the sweet-and-tart corner of the fruit range rather than the cooling or dessert corners.

This is one flavour in a 15-flavour Instaflow 20k range that we stock in boxes of five. The others are Cherry Cola, Cola Lime, Grape Lime, Mango Banana, Mango Pineapple, Mr. Blue Bubble, Mr. Blue Cherry, Mr. Blue Lime, Pineapple Mojito, Pineapple Passion Guava, Strawberry Blue Razz, Strawberry Bubble, Strawberry Cherry and Watermelon Bubble. Every box holds five devices of the same flavour, so you are committing to one taste for the whole box. If you are unsure whether you will enjoy a particular profile, read the flavour section below before you buy five of it.

A multipack makes sense for a few kinds of adult buyer: a vaper who has settled on a flavour and wants to stop reordering, a household of adult vapers sharing one order, or someone who wants to spread the per-device cost down and keep charged spares in a drawer. It makes less sense if you like to change flavour often, because five devices of the same taste can feel repetitive well before the last one is finished.

We have tried to keep this page honest and useful. Where the maker's listing gives a figure, such as the 20k puff rating, we use it. Where a figure is not published on the listing, such as exact battery capacity or coil resistance, we say so and tell you where to find it on the pack, rather than guess a number and pin it on the product. The page also covers the UK rules that affect what you can buy and how you dispose of it, because those matter as much as flavour. Nicotine products are for adults aged 18 or over only, and nicotine is addictive.

• Product: Instamax Instaflow 20k prefilled vape device, flavour Blueberry Razz Lemon
• Pack size: box of 5 devices, one flavour
• Price: £49.29 per box, about £9.86 per device
• Rated puffs: 20k (20,000) per device, as stated by the maker
• Flavour notes: blueberry, lemon and mixed berries
• Age: 18 or over only
• Delivery: free UK delivery on orders over £20, with same-day dispatch on orders placed before 4pm

Performance and Puff Delivery

The headline number on this product is 20k, meaning a rating of 20,000 puffs per device. It helps to understand what that figure is and what it is not. Puff ratings come from the manufacturer's own testing, which uses a machine taking puffs of a set length, volume and spacing. A person does not vape like a machine. Longer draws, faster repeats and stronger pulls all use e-liquid and battery faster than the test does, so the rating works as a way to compare devices from the same maker, not as a promise of how many puffs you will personally get.

There is also a UK-specific point worth knowing. Under UK rules, a prefilled pod or tank for a nicotine product is limited to 2ml of e-liquid. A rating as large as 20,000 puffs is a headline figure used across the high-puff market, and what a single UK-format unit delivers in everyday use varies a great deal from one user to the next. Treat 20k as the maker's label for the line and expect real-world results to differ. If a long-lasting device matters to you, contact us before ordering, and check the pack when it arrives for the volume and rating details printed on it.

For a sense of scale only, here is the arithmetic. At 200 puffs a day, 20,000 puffs would be 100 days per device, and a box of five would stretch to around 500 days if every unit reached its rating. Very few units will, and e-liquid left sitting for many months can change in taste, so this is an illustration of why a multipack is a long-term purchase, not a forecast.

On the draw itself, devices of this type are generally draw activated: there is no button, and the battery fires when you inhale. The draw is usually a gentle mouth-to-lung pull, similar to sipping through a narrow straw, and the vapour output is moderate and steady rather than cloud-heavy. The 'Instaflow' name points towards an airflow-led design, but we do not publish airflow measurements, so judge it by feel. If the draw seems too tight or too loose on the first device, note it before you open the rest of the box.

What to expect across the life of a device:

• Early use: flavour and vapour are at their most consistent once the coil wick is fully saturated, which usually takes a few minutes after unboxing.
• Middle of its life: steady output, with flavour that stays recognisable from puff to puff.
• Late stage: flavour can thin, vapour can drop slightly and a warm or slightly toasted note can appear as e-liquid runs low. That is the cue that the device is close to the end.

Throat hit depends on the nicotine strength you choose and on the e-liquid base. Nicotine salt formulations, common in this category, feel smoother at a given strength than traditional freebase liquids, which is why a 20mg salt can feel gentler than the number suggests. More on strength below.

Flavour Profile: Blueberry, Razz and Lemon

Blueberry Razz Lemon is a layered fruit flavour. The listing notes blueberry, lemon and mixed berries, and the name tells you the third part: 'razz' is vape shorthand for raspberry, often the sweet-tart blue raspberry note familiar from sweets and slush drinks. We have not listed a cooling or menthol note for this flavour, so expect a fruit-forward taste without a strong icy finish.

On the inhale expect the blueberry first: a rounded, jammy sweetness, closer to blueberry sweets or a muffin filling than to fresh fruit. The raspberry sits just behind it and brings the tartness that stops the blueberry from tasting flat. On the exhale the lemon tends to come through, adding a bright, slightly sherbet-like acid edge that clears the sweetness from your palate. That finishing note is what separates this flavour from a straight blueberry or blue raspberry, and it is also why some vapers find a lemon-finished profile easier to live with across a long day than a purely sweet one.

If you are choosing between flavours in the same range, a rough guide based on the flavour names helps:

• Strawberry Blue Razz keeps the blue raspberry idea but swaps the lemon for strawberry, which points to a softer, more candy-like finish.
• Grape Lime and Cola Lime are less berry-led and built around a citrus edge, a sensible alternative if you find blueberry too sweet.
• Mr. Blue Lime and Mr. Blue Cherry are listed under a different flavour name, so they suit someone who wants a similar berry mood with a different partner fruit.
• Mango Pineapple and Pineapple Passion Guava move you to tropical fruit, which is a different mood altogether.

One practical caution is flavour fatigue. Fruit flavours with a sweet base can start to taste muted after a few days of constant use, an effect vapers often call vape tongue. Switching to a different flavour for a day, drinking water, or brushing your teeth usually brings the taste back. With five devices of the same flavour in one box, it can help to alternate with something different if you notice the flavour fading even on a fresh device, as the cause may be your palate rather than the device.

Taste is personal. We describe this profile from the listed flavour notes and the flavour name, and your own experience may be sweeter, tarter or lighter than described. Opened vape products cannot normally be returned for hygiene reasons, so choose a flavour you are confident in before committing to a full box.

Design and Build Quality

Prefilled devices in the 20k class are compact and pocket-sized, built around a sealed body with a mouthpiece at one end, a charging port at the other and an indicator light. We do not publish dimensions or weight for the Instaflow on this listing, so check the pack if size matters to you. As a general rule, a larger battery and a larger e-liquid reservoir make high-rated devices a little thicker and heavier than the small 600-puff style, which is the trade-off for the longer rating.

The box of five is shipped as a retail carton with the individual devices inside. When it arrives, spend two minutes on a quick inspection before you open anything you plan to keep:

• Check the outer carton for damage, crushing or signs that it has been opened.
• Look for the printed nicotine warning, which on a nicotine product should read 'This product contains nicotine which is a highly addictive substance'.
• Check each device body for cracks, loose joints or a mouthpiece that wobbles.
• Look for liquid on the mouthpiece or around the base, which can mean a leak in transit.
• Check that the charging port is clear of debris and not bent.
• Note the batch or lot details on the pack in case you ever need to contact us about a fault.

Build quality in this category comes down to three things: how well the reservoir is sealed, how securely the battery and circuit board are fixed, and how tidy the finish is around the mouthpiece. Differences between brands are small at this price point, so many faults come from handling and storage rather than manufacturing. A device left on a car dashboard, carried loose with keys, or dropped onto a hard floor is more likely to leak or misfire than one treated gently.

A few simple habits protect the devices in the box. Keep them upright. Keep the mouthpiece covered if a cap is supplied. Store spares in the original carton rather than loose in a bag, and keep them away from radiators, windowsills and anywhere that gets hot.

Authenticity matters with multipacks too. Every product we sell is 100% genuine, and it should carry the standard UK labelling. If anything about the packaging looks wrong, such as spelling errors, blurred print or missing warnings, contact us with photos before you use it.

Battery and Charging

The listing does not give a battery capacity for the Instaflow, and we will not invent one. The figure, normally shown in milliamp hours (mAh), is printed on the pack or in the leaflet and is the number to look for if you want to compare it with another device. As a loose guide to the category only, rechargeable high-puff devices usually carry cells somewhere in the several-hundred to roughly one-thousand mAh range. A rating of 20,000 puffs is not realistic on a small cell that cannot be recharged, which is why devices at this level are built to be topped up, usually through a USB-C port.

How to charge it well:

• Use a standard 5V USB charger or a computer USB port. A phone charger is fine. Avoid unbranded or damaged cables and chargers.
• Plug in when the indicator shows a low battery, not only when the device has gone completely flat. Short top-ups do no harm.
• Charge on a hard, non-flammable surface, away from curtains, bedding and sofas.
• Do not leave a device charging unattended overnight or while you are out of the house.
• Unplug when the indicator shows the charge is complete. Charging time varies with cell size, and a small cell is usually done within a couple of hours, but check the pack for the maker's figure.
• Do not use the device while it is charging unless the maker's leaflet says that is safe.

A single charge will not carry a device through its whole rating, so expect to recharge several times over the life of one unit. How often depends on how much you vape. If you notice the battery draining much faster than before, or the device cutting out mid-puff, that can be a sign the cell is tired or the liquid is nearly gone.

Lithium cells are safe in normal use, and faults are rare, but they deserve respect. Do not charge a device that is hot, swollen, cracked or leaking, and do not leave one in a hot car or in direct sun. Do not crush, puncture or try to open the device. If a battery smells of burning or becomes unusually hot, unplug it and move it somewhere safe away from anything flammable. The same care applies at the end of its life: a spent device still holds a charged cell, which is why used vapes must be recycled and never put in a bin (see the UK rules section below).

On a box of five, battery health is also a storage question. Unopened devices can sit in a cool, dry place for a while, but a lithium cell left empty for months can lose capacity, and one kept in heat ages faster. If you plan to keep spares for several months, store them at around room temperature and follow any storage guidance printed on the pack.

Coil and Mesh Technology

The coil is the heating element that turns e-liquid into vapour, and it largely decides how the flavour comes across. Many current prefilled devices use a mesh coil instead of the older wound-wire coil. A mesh coil is a thin metal sheet with a pattern of tiny holes, held against a cotton wick. Because the heating surface is larger and more even, mesh heats up quickly, produces fewer hot spots and tends to deliver steadier flavour from the first puff to the last. Some high-rated devices combine two mesh coils to keep output consistent as the e-liquid level drops.

We have not published the exact coil configuration or resistance for the Instaflow, so check the pack or leaflet if this detail matters to you. What we can do is explain what mesh technology means in practice, and how to look after any coil in a device like this:

• Let the wick soak. A fresh device needs a few minutes for e-liquid to saturate the cotton. Vaping straight away can cause a dry, burnt first draw and shorten the coil's life.
• Pace your puffs. Rapid back-to-back draws can outrun the wick's ability to refill. A pause of a few seconds between puffs keeps the cotton wet.
• Avoid very long draws. A gentle, steady puff of two to three seconds is enough. Extra-long pulls drive the coil harder than it needs.
• Do not dry-fire. When the device is empty or the vapour thins out, stop. Pulling on a dry coil tastes unpleasant and wears it out.
• Keep it upright. Storing a device on its side or upside down can leave the wick starved or flood the airway.

Mesh versus round wire, honestly: mesh gives more consistent flavour and a quicker response, which is why it has become standard in this class. The trade-off is that mesh coils are more sensitive to a wick that has not saturated and to heavy chain vaping, because the larger surface can dry out quickly. They are not harder to use, but they reward a few minutes of patience at the start and a sensible pace afterwards.

Nothing about the coil changes how much nicotine is in the e-liquid. That is set by the strength you choose, and the coil only affects how smoothly and how warmly the vapour is delivered. If you are used to a tighter, cooler draw from a wound-wire pod system, give a mesh device a few days before judging it, as the warmer, fuller flavour takes some adjustment.

Nicotine Strength Guidance

In the UK, nicotine e-liquid is capped at 20mg per ml, which is 2%. That is the legal ceiling for every nicotine vaping product on sale here, including prefilled devices like the Instaflow. The strengths you will normally see in this category are 10mg and 20mg, usually nicotine salt formulations, and some products are also offered nicotine-free. The strength offered for this box is shown on the product listing and printed on the pack, so check both before you complete your order.

Choosing a strength is a personal decision, and these are general pointers, not medical advice:

• Nicotine-free (0mg): for adults who want the flavour and the hand-to-mouth habit without nicotine.
• 10mg: a milder throat hit, often chosen by adults who smoked lightly, by existing vapers who find 20mg too sharp, and by people who vape frequently through the day.
• 20mg: the legal maximum, often chosen by adults switching from heavier smoking who want a satisfying hit from a modest number of puffs. In a nicotine salt the throat hit is smoother than the same strength in freebase.

Three practical points follow. First, the number on the pack is a concentration, not a total dose. A device with a large rating holds a lot of e-liquid in total, so a higher-strength unit delivers a lot of nicotine across its life, and many people end up taking fewer or shorter puffs than they expected. Second, if you notice headaches, nausea, dizziness or a racing heart, you may be taking in too much nicotine: stop, drink some water and consider a lower strength next time. Third, if you are pregnant, breastfeeding, have a heart condition or take regular medication, speak to a GP or pharmacist before using any nicotine product.

Nicotine is addictive. These products are for adult smokers and existing vapers. They are not for people who have never smoked, and they must never be sold to, or bought on behalf of, anyone under 18.

Because this is a box of five, think about whether you are committing to five lots of a strength you have not tried before. If you are new to a strength, it is reasonable to start lower and work up, rather than putting a full box on the top of the range. If you already know that 10mg or 20mg suits you from another device, match it here, bearing in mind that a fruit flavour with a sweet base can taste smoother than it really is, which makes it easy to vape more than you intend.

Who the Instaflow 20k Box of 5 Is For

The Instaflow 20k Blueberry Razz Lemon box of 5 is aimed at adults who already smoke or vape and want a ready-to-use, no-refill device in a fruit flavour. In practice, the buyers who get the most from it tend to fall into one of these groups:

• Adult smokers switching to vaping who want a simple, prefilled format with no coils, tanks or bottles to manage.
• Existing vapers who have settled on a flavour and want to buy in bulk at a lower per-device price.
• Shared households of adult vapers who would otherwise place several separate orders.
• Adults who travel or work irregular hours and like having a charged spare in a bag or a drawer.
• Fruit-flavour fans who like sweet-and-tart profiles and do not want a menthol or dessert taste.

It is a poor fit for some people, and it is better to say so plainly:

• Anyone under 18. This product is not for you, and it is illegal to sell it to you or to buy it on your behalf.
• Non-smokers. Nicotine is addictive, and these products are not intended as a starting point.
• People who like to change flavour often. A box of five of the same flavour will feel repetitive.
• Vapers who prefer adjustable devices. A prefilled, fixed-output device has no adjustable wattage or airflow, and it is not designed to be filled with your own e-liquid.
• Occasional users. If you vape a handful of times a week, five devices may outlast the sensible life of the e-liquid, and a smaller pack would be better value.
• Anyone who dislikes sweetness. The blueberry base is sweet, with only the raspberry and lemon to balance it.

If you are unsure which description fits you, think about how you will use it day to day. A common downside of multipacks is buying more than will be used and ending up with devices stored for a year. The upside is the opposite: a regular daily vaper who has found a flavour that works and no longer has to think about the next order.

It is also worth being realistic about size and discretion. A high-rated device is bigger than a small 600-puff style, so if you want something that disappears into a coin pocket, check the dimensions on the pack. And if you share a household with children or pets, plan where five devices will be kept: nicotine products should always be stored out of reach.

How to Use Your Instaflow Device

Using a prefilled device is simple, but a few habits make a real difference to flavour and device life. Here is a straightforward routine for the first device in the box:

• Check the seal and the pack. Make sure the outer carton and the device are intact, and read the leaflet for the maker's instructions.
• Remove any wrap or cover. Take off any plastic film, mouthpiece cover or protective tape.
• Let it rest. Wait three to five minutes after unboxing so the wick can saturate. Keep it upright during this time.
• Take the first puffs gently. Draw slowly for two to three seconds, and pause between puffs.
• Use a mouth-to-lung draw. Pull the vapour into your mouth first, pause, then inhale. This style suits prefilled devices and nicotine salt liquids.
• Do not use it while it charges, unless the maker's leaflet explicitly allows it.
• Recharge when the indicator shows low battery. Do not wait for the device to cut out.
• Stop when the vapour fades. If the flavour has gone and the vapour is thin even after a charge, the e-liquid is spent.

Some devices have an indicator light that flashes when you puff, while others show battery status in a different way. The leaflet explains the colour code for your unit. If your device takes replacement pods, change the pod when the flavour fades, not before. If it does not, the device as a whole reaches the end of its life at that point and should be recycled.

Looking after the other four in the box matters too. Keep unopened devices in their carton, upright if possible, somewhere cool, dry and out of sunlight. Writing the date you opened the first one on the carton helps you keep track of how long each device lasts you, which is useful when deciding whether to reorder the same flavour.

Keep every device, charged or not, away from children and pets. Nicotine e-liquid is harmful if swallowed or if it touches skin or eyes. If that happens, rinse the area with plenty of water, seek medical advice and keep the pack to hand so you can show the nicotine strength.

Finally, be considerate about where you use it. Many public places, workplaces, trains and venues have their own rules on vaping, and you should always follow them. Never use a vape while driving in a way that distracts you, and never share a device with anyone under 18.

Troubleshooting Common Problems

Most faults on prefilled devices are simple to diagnose. Here is a practical checklist, in the order we would try things:

• No vapour at all. Check the battery first: plug the device in for a few minutes and try again. If it is charged, make sure the mouthpiece airway is not blocked by a cover or film, and give a new device a few minutes to saturate. Draw gently a few times before concluding it is faulty.
• Weak vapour or thin flavour. Likely causes are a low battery, vape tongue, or a wick running dry because of rapid chain puffing. Pause, drink water, try a different flavour for an hour, then try again. If the device is nearly empty, thin flavour is simply the natural end of its life.
• Burnt or toasted taste. This usually means the coil is drying out, either because the device is nearly empty or because of long, rapid puffs. Stop using it. A burnt taste does not recover once the e-liquid is gone.
• Gurgling or spitting. Condensation or excess liquid in the airway. Hold the device upright, wipe the mouthpiece and blow gently through it, away from your face, to clear it. Do not shake it.
• Leaking. Wipe the device clean, keep it upright and avoid squeezing the body. A leak after rough handling or heat exposure is common. A leak straight out of the box is a fault, and you should contact us with photos.
• Will not charge. Try a different cable and a different power source, and check that the port is clear of lint. If the indicator still does not respond, contact us.
• Indicator flashes without puffing. This can mean low battery or a protection mode. Unplug, wait a minute, then try again. If it continues, stop using the device.
• Device gets hot. Stop using it straight away and let it cool away from anything flammable. If it gets hot while charging, unplug it and do not use it again.

Safety comes first. If you ever see smoke, swelling or flames, or smell burning, unplug the device if you can do so safely, move away from it, keep other people clear and call 999 if there is a fire. Do not try to put out a lithium battery fire with a small amount of water or by handling the device.

When to contact us: if a device is faulty or damaged on arrival, send your order number, the flavour name and clear photos or a short video of the problem. Please keep the device and packaging, and do not take it apart. We will look at the options, including a replacement or refund in line with your statutory rights. Because there are five devices in the box, check each one when it arrives or soon after, so that any issue is reported promptly rather than months later when it is harder to establish what happened.

UK Rules, Nicotine Limits and Recycling

Several UK rules shape what you can buy and how you should handle it, so it is worth a quick read. This is general information and not legal advice.

• Age. You must be 18 or over to buy a vape or nicotine product in the UK. It is also an offence to buy one on behalf of someone under 18.
• Nicotine cap. E-liquid for nicotine vaping products is capped at 20mg per ml. This applies to prefilled devices of every kind, including disposable-style ones.
• Volume limits. Prefilled pods and tanks for nicotine products are capped at 2ml, and refill bottles at 10ml.
• Warnings and notification. Nicotine vaping products must carry the nicotine warning and be notified to the MHRA before sale.
• Single-use vapes. Since 1 June 2025 it has been illegal across the UK to sell single-use vapes. To be sold as a reusable device, a vape must be rechargeable and either refillable or designed for replaceable pods. When your device arrives, read the pack and leaflet to see how it is meant to be recharged and what happens when the liquid runs out. If you have questions about how a particular device is designed to be reused, contact us before ordering.

Recycling is the part most buyers overlook. A vape holds a lithium battery, and a spent device still contains a charged cell, so it must never go in household bins, kerbside recycling or street bins. Lithium battery fires in bin lorries and recycling plants are a recurring problem in the UK. Instead, use one of these routes:

• Take it back to a shop. Many shops that sell vapes accept used ones for recycling, and many larger shops and convenience stores have a collection bin.
• Use a household waste recycling centre. Most council tips have a small electricals area that takes used vapes and batteries.
• Use a supermarket or electrical retailer drop-off. Many have small-electricals or battery bins near the entrance. Check what the bin accepts before you use it.
• Find a drop-off point. The Recycle Your Electricals postcode search lists nearby places to drop off small electricals, and your local council website usually lists vape recycling points too.

Do not try to remove the battery, crush the device or burn it. Leave any remaining liquid inside. If a device is damaged, swollen or leaking, place it in a bag or plastic tub away from flammable items, and tell the staff about the damage when you hand it over.

With a box of five you will have five devices to dispose of over time, so it can help to keep a small tub for spent devices until you have a few to take together. Store it somewhere cool and away from children, and do not let the pile sit for months.

Value for Money and How It Compares

At £49.29 for five devices, the Instaflow box works out at about £9.86 per device. Each device is rated at 20,000 puffs by the maker, so the box carries a combined rating of 100,000 puffs, and on paper the cost is under 0.05p per rated puff. We include that only as arithmetic. Because puff ratings are manufacturer estimates and real-world results vary, the useful way to judge value is by what you will actually finish. Five devices used steadily over several months can be good value. Five that sit unused are not.

Points in favour of the box:

• One order, one delivery and one price for five devices, rather than five separate purchases.
• Free UK delivery, because the box alone is well over the £20 threshold.
• A 15-flavour range at the same price, so changing your mind on flavour does not change your budget.
• Charged spares on hand, which suits irregular schedules and shared households of adults.

Points against:

• You commit to one flavour for five devices.
• The up-front cost is higher than for a single device.
• If you only vape occasionally, you may not finish the box before the e-liquid ages.
• Our listing does not publish battery capacity or coil specifications, so a like-for-like comparison with other brands relies on the printed pack.

On comparisons, we want to be fair. Established brands such as Elf Bar, Lost Mary, Geek Bar and Hayati all sell high-puff-count devices, and several sit in the same rough class as the Instaflow. We stock a range of these brands, and none is a straight upgrade or downgrade of another. The practical differences come down to four things:

• Flavour range and taste. This is the largest difference. Blueberry Razz Lemon is a flavour you either like or do not, so compare the flavour lists of each brand, not just the specs.
• Draw feel. Airflow and resistance vary by brand. The Instaflow name suggests an airflow focus, but the only reliable test is to try one.
• Brand familiarity. Larger names have a bigger following and more third-party reviews. Instamax is a less widely discussed name, which means fewer independent reports to read before you buy.
• Pack format. This listing is a box of five, while many rival devices are sold singly, so compare the cost per device rather than the headline price.

If you already use and like another brand, there is no strong reason to switch on specifications alone. If you want a blueberry, raspberry and lemon blend, or you want to buy in bulk, the Instaflow box is a reasonable candidate. And if you are still choosing between flavours, remember that the other 14 Instaflow flavours are listed at the same £49.29, so you can pick the one you prefer without changing your budget.

Every item we sell is 100% genuine and sold to adults aged 18 or over only. Orders over £20 ship free across the UK, and orders placed before 4pm are dispatched the same working day.