Super happy with the order
Battery lasts me a full day easily. Charging is quick. Overall very pleased with the purchase.
DoubleThe Blue Slush Ice Double Brew Nic Salts 10ml 20mg by Double in Blue Slush Ice at 20mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.
Double Brew Nic Salts Blue Slush Ice is a 10ml bottle of nicotine salt e-liquid at 20mg/ml (2% nicotine), which is the highest strength that can legally be sold in the UK. It is a refillable-format liquid, meaning you pour it into the pod or tank of a compatible vape kit rather than puffing on a sealed, pre-filled device. The flavour is a blue, fruit-forward slush with a cold finish, aimed at adult vapers who like sweet and chilled profiles and who want a smooth nicotine delivery at low power.
This page is a practical, honest guide to what the bottle is, what it is not, which devices suit it, how it behaves in daily use and where it sits against alternatives. It is written for UK buyers, so the regulatory background (strength caps, bottle sizes, age checks and disposal rules) is included where it affects your decision.
Quick facts at a glance:
It is worth being clear about the format early, because the UK market has changed a lot. Single-use disposable vapes can no longer be sold in the UK following the ban that came into force on 1 June 2025, and even before the ban, disposables were limited to 20mg/ml and a 2ml tank. A 10ml nic salt bottle is the legal, refillable route that gives you five times the liquid of a typical 2ml disposable, a choice of devices and a much lower waste footprint, because you keep the hardware and only replace pods or coils.
The rest of this guide covers the flavour in detail, nicotine strength, performance, build quality, the devices that work best, charging and battery care, how to fill and use it, who should and should not buy it, troubleshooting, value for money, honest comparisons and storage and recycling. If you only want the short version: it is a sweet, cooling blue slush salt that suits adult smokers switching to vaping and runs best in a pod device at roughly 8 to 15 watts.
The name tells you most of what to expect. Blue Slush Ice sits in the sweet-and-cold corner of the fruit e-liquid category. In vaping, a blue slush flavour is usually built around a sweet blue-fruit note in the blue raspberry family, softened with a syrupy, slightly tart character that imitates a frozen slush drink. The Ice part of the name refers to a cooling agent added to the flavour, which gives a fresh, chilled sensation on the exhale instead of an actual minty taste.
Here is how the flavour typically unfolds across a single puff, so you know what you are buying:
Cooling intensity is the main variable people differ on. Blue Slush Ice is a chilled flavour rather than an extreme one, so most vapers find it comfortable, but if you are sensitive to cooling agents you may notice a tingling sensation in the throat after several puffs in a row. If you prefer your fruit flavours with no cold effect at all, a non-ice blue flavour from a similar range will suit you better.
How you vape also shapes how the flavour tastes. At lower wattage the liquid vaporises more gently, so you get a cooler, lighter vapour where the fruit and the ice are well balanced. Push the power higher and the sweetness becomes warmer and heavier while the cooling effect fades, so a lot of people settle on the lower half of their device power range for this style of flavour.
Like any sweet e-liquid, the flavour can fade over a few days of constant use. This is usually vaper's tongue (flavour fatigue) rather than a fault in the bottle. If Blue Slush Ice seems to lose punch, switch to a different flavour for a day, drink some water, or try a menthol or tobacco liquid briefly. The blue slush taste normally returns at full strength.
Finally, remember that this is a single-flavour bottle with no tobacco, cream, dessert or menthol layers. That keeps the profile clear and easy to describe, and it also means there is little to hide behind: if you do not enjoy sweet blue fruit flavours, this will not become your favourite just because it is cold.
Nicotine salts are a form of nicotine bonded with an acid, commonly benzoic acid, which lowers the pH of the liquid. The practical effect is that the nicotine feels noticeably smoother in the throat than the same strength of freebase nicotine, so you can use a higher concentration without the harsh scratch you would get from 20mg freebase. The salt form is also absorbed fairly quickly, which is why many people moving away from cigarettes find it more satisfying at low power than traditional freebase e-liquid.
The 20mg/ml strength in this bottle equals 2% nicotine. That is the maximum allowed in UK-sold e-liquids and it is also the cap that applied to disposables before they were banned. It is a strong liquid, and you should treat it as such. Here is a rough guide to choosing a strength, bearing in mind that everyone is different:
Signs a strength is too high include dizziness, nausea, headaches, a racing heart, a very harsh throat hit or feeling jittery. If any of these happen, stop, drink water and move to a lower strength. Signs it is too low are frequent chain vaping, constant cravings, irritability and still reaching for cigarettes. Be honest with yourself about which side you are on, because the aim is to stop smoking completely.
A sensible plan for many switchers is to start on 20mg, stabilise for several weeks, then move to 10mg and eventually lower as cravings reduce. Your local NHS stop smoking service can offer free support and combine vaping with behavioural help, which improves quit rates. This page is general information and not medical advice. If you have heart conditions, are pregnant or breastfeeding, or take regular medication, speak to a healthcare professional before using any nicotine product.
Do not use nic salt at 20mg in a sub-ohm tank running at high wattage. High-power devices produce far more vapour per puff, and the nicotine intake becomes much larger than the strength suggests. Nic salts are designed for low-power mouth-to-lung use, which is covered in the device section below.
Performance with a nic salt is different from performance with a big-cloud freebase liquid, so it helps to judge it on the right criteria: nicotine satisfaction, flavour accuracy, throat comfort and consistency from the first fill to the last.
Nicotine delivery. At 20mg/ml, Blue Slush Ice gives a firm nicotine hit that most smokers find satisfying in only a few puffs. Because nic salts absorb quickly, you typically take fewer, shorter puffs than you would with a low-strength freebase liquid. This is useful for people who find it hard to sit through long vaping sessions, and it is the main reason salts are popular with ex-smokers.
Vapour production. Expect modest, discreet vapour. Pod kits run at low wattage and use a tighter airflow, so the clouds are smaller than those from a sub-ohm setup. The exact PG/VG ratio is printed on the bottle label and varies between ranges, but nic salts generally lean towards a higher proportion of PG or a balanced split, because thinner liquid wicks well in small coils and carries flavour efficiently. If you want a hazy, thick cloud, this is not the product category for it.
Throat hit. Salt nicotine softens the harshness, but the ice cooling adds a different sensation. Most people describe the combined effect as crisp rather than scratchy. If you feel the throat hit is stronger than you want, lower the wattage slightly or switch to a 10mg bottle of the same flavour if available.
Puffs per bottle. There is no official puff count for a bottle, because it depends on your device, power and draw length. As a rough planning figure only, many pod users get somewhere around 150 to 250 puffs per millilitre, which would put a 10ml bottle at roughly 1,500 to 2,500 puffs. Heavier vapers will be at the lower end of that range, and light users at the higher end. Treat it as an estimate rather than a specification.
Consistency. A well-sealed 10ml bottle should deliver the same flavour from the first refill to the last, provided the coil is in good condition and the liquid is stored properly. The most common sources of inconsistency are not the liquid itself but a tired coil, a half-empty pod that is dry-hitting, or overheating from too high a wattage. These are all covered in the troubleshooting section.
Where it performs best. Between roughly 8 and 15 watts in a pod device with a mesh or ceramic coil, using slow, steady 2 to 3 second draws. In that window you get the best compromise between flavour, cooling, battery life and coil lifespan.
Because this is an e-liquid, the design and build quality that matters is the bottle, the cap, the label and how well the pack protects the liquid, not a case or a screen. Here is what to look for in the bottle you receive and why each element matters.
Build quality in practice. A good bottle is squeezable enough to dispense one controlled drop at a time but sturdy enough not to leak when carried. When it arrives, check that the cap closes fully, the tip is intact and no liquid has crept around the neck. A little residue on the outside of a pack is not unusual in transit, but a half-empty bottle is a reason to ask for a replacement.
Storage. Keep the bottle upright, capped, away from sunlight and heat, and well out of reach of children and pets. Nicotine liquid is poisonous if swallowed or spilled on skin in large quantities, and the sweet fruit scent makes it more tempting to small children than a tobacco flavour would be. A cool cupboard or drawer is ideal. Heat and light can darken the liquid and dull the flavour over time, so avoid leaving it in a car or on a windowsill. Properly stored, unopened bottles usually keep their quality for around 12 months or more, and you should always follow any date printed on the label.
Empty bottles. Once empty, the plastic bottle can usually go into household plastic recycling, though local rules vary, so check your council guidance. If the bottle is part-used and you no longer want it, do not pour it down a drain. Contact your local household waste recycling centre for advice on disposing of nicotine liquid safely.
Choosing the right device is the single biggest factor in how good this liquid tastes and how much you enjoy using it. Nic salts are designed for small, low-power, mouth-to-lung devices, and Blue Slush Ice is no exception.
Devices that suit it:
Devices to avoid: sub-ohm tanks with coils below about 0.5 ohms, devices running above roughly 25 watts, and any kit marketed for large clouds. These push too much liquid through the coil, which can make 20mg salt too harsh and too strong, and wastes your liquid quickly.
Coil types explained. Most modern pods use one of two coil styles:
Coil lifespan with sweet flavours. Sweeteners in fruit and slush e-liquids can caramelise on the coil surface, forming a dark residue that dulls flavour. As a rough guide, a coil in a pod used daily with sweet liquid lasts around one to two weeks, though this varies with wattage and how often you chain vape. A taste that turns flat or slightly burnt is usually your signal to swap the pod or coil, not to increase the power.
Priming. Always let a freshly filled pod or new coil sit for 5 to 10 minutes before the first puff. This allows the cotton or ceramic to saturate, and it is the best way to avoid an early dry hit that can ruin a new coil.
A bottle of e-liquid has no battery of its own, but the device you pair it with does, and the way you charge and care for it affects safety, performance and lifespan. Here is what to consider when you use Blue Slush Ice in a pod or low-power kit.
Typical battery sizes. Entry-level pod kits generally carry batteries somewhere between 400mAh and 1,000mAh, while larger pen-style kits go beyond that. Because nic salt devices run at low power, a pod kit with a battery of 500 to 800mAh will usually last a moderate vaper a day or so before a recharge is needed, though heavier use shortens that. Consider these as ballpark figures, since the real number depends on the device, wattage and how often you take a puff.
Charging habits that help:
Matching power to the liquid. Because nic salt is meant for lower wattage, it is easy on the battery. Running at 10 to 12 watts rather than 25 or 30 watts can extend the time between charges noticeably. It also reduces the chance of overheating the coil, which helps with flavour and coil life.
Cleaning the device. Wipe the pod contacts and the battery connection with a dry cloth or cotton bud occasionally. Sticky sweet residue from spilled liquid can interrupt the connection and cause a no-fire message. Take care not to push liquid into the airflow or the battery compartment.
Recycling devices and batteries. Vape devices and lithium batteries should never go into household bins or general recycling bins, because damaged lithium cells can start fires in collection vehicles and waste plants. In the UK, you can take old devices to many household waste recycling centres, and retailers that sell vaping products are required to offer take-back for waste electrical items. Look for a nearby drop-off point through your local council or the retailer, and remove nothing yourself unless the manual shows how.
Using a 10ml nic salt bottle is straightforward once you have done it once or twice. Follow these steps for a clean, leak-free refill.
Vaping technique. Nic salts are designed for mouth-to-lung inhaling. Draw slowly for about 2 to 3 seconds into your mouth, pause for a moment, then inhale into the lungs and exhale. Avoid very long, very fast draws, which can overheat the coil, and avoid chain vaping, which does not give the coil time to re-wet. A short pause between puffs improves flavour and extends coil life.
How often to refill. A typical pod holds about 2ml, so a 10ml bottle fills a pod roughly four to five times once you account for some wastage. Check the level through the pod window and refill when it drops to about a quarter of the way full, rather than running it dry. A dry pod is the leading cause of a burnt taste.
Changing flavours. If you move from this flavour to a different one, use a new pod or coil where practical. Residue from the previous liquid can mix with the new flavour and muddy both. If you only have a single pod, empty it, rinse it with warm water, let it dry fully and refill.
Keep it away from children. Always cap the bottle right after filling and store it somewhere children and pets cannot reach it. Never fill a pod in front of small children and never leave a half-filled pod unattended.
Blue Slush Ice 20mg is a targeted product. It is a good match for some adults and a poor match for others, and being clear about the difference is more useful than a generic recommendation.
It is likely to suit:
It is likely to be a poor choice for:
If you are unsure which category you fall into, start by considering how many cigarettes you smoke now and whether you plan to quit completely. Many people find that a full switch is easier with a strength that properly satisfies them, then reduce gradually once cravings settle.
Most problems with a nic salt and pod kit are simple to fix. Work through the likely causes below before you assume the liquid or the device is faulty.
If you have done all of this and the problem continues, contact the retailer with your order number, a description of the issue and, if you can, a photo. A clear report helps the team resolve it quickly.
Value is about more than the sticker price. For a 10ml e-liquid you should think in terms of cost per millilitre, how long a bottle lasts, what the device and coils add to the total, and how the cost compares with other nicotine options.
Volume compared with disposables. A 10ml bottle contains five times the liquid of a 2ml disposable, and disposables are no longer a legal option in the UK in any case. If you were previously buying a new disposable every few days, switching to a refillable setup with 10ml bottles is normally cheaper over a month, even after you account for the cost of a pod kit and occasional replacement coils.
How long a bottle lasts. This depends on how much you vape. A light user might take one to two millilitres a day, which means a 10ml bottle lasts around five to ten days. A heavy user on a pod device could go through three millilitres or more per day, making a bottle last closer to three days. Using the rough figure of 150 to 250 puffs per millilitre mentioned earlier, one bottle represents several days to a couple of weeks of typical use.
Hidden running costs to factor in:
Compared with smoking. A pack of 20 cigarettes now costs well over £15 at most UK shops, so for a regular smoker a vape kit with 10ml bottles of nic salt can offer a large saving. Of course, the lasting benefit is the health one, since you are stopping inhaling tobacco smoke.
Getting a better price. Check whether the shop offers multi-buy deals on 10ml bottles, because buying several of the same range usually lowers the per-bottle price. Compare cost per millilitre across ranges rather than comparing sticker prices, and make sure a cheaper bottle is the same nicotine strength and a genuine, correctly labelled product. Avoid unusually cheap unbranded liquids, since the label, ingredients and notification details matter for safety.
Verdict on value. For an adult smoker who wants a sweet ice flavour at 20mg, a 10ml nic salt bottle is a sensible, economical option compared with disposables and cigarettes. Its value depends mostly on pairing it with a suitable device and replacing coils on time, so that you do not waste liquid on dry or burnt pods.
No single e-liquid suits everyone, so here is a fair look at how Blue Slush Ice 20mg compares with the alternatives you are likely to be considering.
Versus single-use disposables. Disposables have now left the UK market. Even when they were available, a disposable offered convenience with no filling, but with 2ml of liquid, no ability to change flavour in the same device and a lot of electronic waste. A refillable kit with a 10ml nic salt takes slightly more effort but gives better value, much less waste and a choice of devices and flavours.
Versus freebase e-liquid. Freebase liquids in 3mg, 6mg or 12mg strengths are designed for larger sub-ohm tanks and direct-to-lung vaping, giving bigger clouds and fuller flavour at higher wattage. They suit people who enjoy vapour production or who no longer need a strong nicotine hit. Nic salts like this one win on throat smoothness at high strengths, speed of satisfaction and compact devices. Freebase wins on cloud size and lower nicotine options for tapering.
Versus other 10ml nic salt ranges. There are many established ranges in the UK market offering blue raspberry style and ice flavours at 20mg, including ranges from big disposable-brand spin-offs and independent e-liquid makers. In practice, the differences come down to flavour balance (sweetness against tartness against cooling), the PG/VG ratio and the price per bottle. It is hard to claim one is objectively better, because taste is personal. If you like the idea of a blue slush with a chilled finish, this bottle is a reasonable place to start, and you can compare it with similar flavours from other ranges using a multi-buy to keep the cost low.
Versus the same flavour at 10mg or 5mg. If this flavour is offered in lower strengths, use them to step down once your cravings ease. A lower strength usually gives a gentler throat hit and lets the sweet fruit and cooling show through more, which some people prefer even at the start.
Versus prefilled pods. Prefilled, replaceable pods are convenient and avoid spills, but cost more per millilitre and lock you into one manufacturer. Refillable pods with a 10ml bottle usually save money in the long run and give you a much wider choice of flavours.
Where this product is weaker. It is not for large clouds, it will not suit anyone averse to cooling agents, and its sweetness shortens coil life compared with tobacco or plain menthol. Weighed against those limits, it does what it claims: a sweet, chilled blue slush flavour in a smooth 20mg salt that suits low-power pod devices.
| Brand | Double |
|---|---|
| Product type | E-Liquid |
| Nicotine strength | 20mg |
| Available flavours | 1 (Blue Slush Ice) |
| Price | £1.10 |
| Availability | In stock — same-day dispatch |
| Compliance | UK TPD-compliant, MHRA-registered |
Double supplies e-liquids to the UK market through Vape Shop Online. We stock the current Double range in full with same-day dispatch on weekday orders before 4pm.
20mg/ml (2%) is the highest strength allowed in the UK and is aimed at heavier smokers who are switching to vaping. If you smoke fewer than around 10 cigarettes a day, 10mg or 5mg salts are usually more comfortable, and you can step down gradually as your cravings settle. If 20mg makes you dizzy, nauseous or jittery, stop and move to a lower strength.
It is not recommended. Nic salts at 20mg are designed for low-power mouth-to-lung pod kits and pen devices, typically running at roughly 8 to 15 watts with coils of about 0.8 ohms or higher. Sub-ohm setups produce far more vapour per puff, which makes the nicotine intake much greater and the throat hit harsh.
The e-liquid has no battery, so charging depends on your pod kit or pen. Use the supplied USB cable or a reputable certified charger, charge on a hard surface, and do not leave it charging unattended or overnight. Most pod kits take about 30 to 90 minutes to charge, so follow the instructions in your device manual.
Yes, you can change flavour by emptying and rinsing the pod, or by fitting a fresh pod or coil, so the old taste does not carry over. Many nic salt ranges, including this one in some cases, offer the same flavour in lower strengths such as 10mg or 5mg. Check the product listings on the site for the strengths and variants currently in stock.
It depends on how much you vape. A light user taking one to two millilitres a day may get five to ten days from a bottle, while a heavy pod user might use it up in three days or so. As a rough planning figure only, a 10ml bottle gives somewhere around 1,500 to 2,500 puffs, though this varies by device and draw length.
A 10ml bottle holds five times the liquid of a 2ml disposable, and single-use disposables can no longer be sold in the UK. With a refillable kit, the cost per millilitre is usually lower, though you should include replacement coils or pods in your budget. For a regular smoker, the running cost is normally well below the cost of cigarettes.
It suits adult smokers who want to switch, former disposable users and anyone who likes sweet, chilled flavours in a pod device. It should not be bought by anyone under 18, by non-smokers, or by people who are pregnant, breastfeeding or have heart conditions, unless a healthcare professional has advised otherwise. Cloud chasers and people who dislike cooling agents will probably prefer something else.
This is often flavour fatigue, where your taste buds become used to a sweet flavour. Try a different flavour or a menthol for a day, drink water and then go back. If the taste is still flat or burnt, the coil is probably worn and the pod or coil should be replaced, which is more common with sweet liquids.
We deliver to addresses throughout the UK, and you must be 18 or over to buy and receive nicotine products. Age checks may be carried out at checkout and on delivery, so someone over 18 must be available to accept the parcel. Delivery options and estimated times are shown at checkout.
Do not use a bottle if the tamper-evident seal is broken or it has leaked heavily. Contact us with your order number and a photo and we will arrange a replacement or refund in line with our returns policy. For hygiene and safety, opened e-liquid bottles are generally not eligible for return unless faulty, so check our returns page for full details.
Royal Mail Tracked 24 (Next-Day): £1.99, FREE on orders over £20.
DPD Next Working Day: £3.99 (£2.99 over £20), FREE over £100.
Same-day dispatch on orders placed before 4pm Mon-Fri. See our delivery page for full details.
Battery lasts me a full day easily. Charging is quick. Overall very pleased with the purchase.
This is now my daily. Flavour is spot on and it lasts well. Proper good product.
Does what it should. Smooth hit, no burnt taste even after a couple of weeks. Would recommend.
Been meaning to leave a review for a while. This has become my daily go-to. Highly recommend.
Did a comparison with another brand and this came out on top. Better flavour and better value.
Arrived well-packaged with next-day delivery. Taste is clean and authentic. Nothing to complain about.
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