Rainbow Elux Nic Salts 20mg

Overview

The Rainbow Elux Nic Salts 20mg by Elux in Rainbow at 20mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.

Elux Nic Salts 20mg Rainbow overview

Elux Nic Salts 20mg Rainbow is a 10ml bottle of nicotine salt e-liquid built around a sweet, multi-fruit candy flavour. It is made for refilling pod kits and other low-power refillable devices, so there is no battery, coil or charging port in the box. What you get is the liquid, and you supply the hardware. That is a different proposition from the sealed devices Elux became known for, and it is worth understanding before you add it to your basket.

The name tells you most of what you need to know. Nic Salts means the nicotine is in salt form rather than the freebase form used in older, higher-power e-liquids. 20mg means 20mg of nicotine per millilitre, which is a 2% strength and the legal maximum for any nicotine e-liquid sold in the UK. Rainbow is the flavour, a bright fruit-candy profile in the same family as the mixed fruit chew sweets many people grew up with.

Here is the product at a glance:

• Type: nicotine salt e-liquid for refillable pod and mouth-to-lung devices
• Bottle size: 10ml, the largest bottle size allowed for nicotine e-liquid in the UK
• Nicotine strength: 20mg/ml (2%)
• Flavour: Rainbow, a sweet mixed fruit-candy blend
• Base: a balanced VG/PG mix typical of the Elux salt range, so check the label on your bottle for the exact ratio
• Suited to: pod kits, mouth-to-lung tanks and other devices running at roughly 8W to 20W
• Age restriction: adults aged 18 and over only

Since single-use disposable vapes were banned in the UK on 1 June 2025, refillable systems have become the practical route for anyone who liked the Elux style of flavour. A bottle like this, paired with a reusable pod kit, gives you a similar type of flavour and nicotine delivery without throwing away a battery and a plastic body every few days. It is also worth knowing that the 20mg limit that applied to disposables is the same limit that applies to every nicotine e-liquid on sale here, so a 20mg bottle is the top of the legal range rather than a special strong edition.

This guide covers what to expect from the liquid, which devices suit it, how to choose a strength, and how it sits against rival nic salt ranges, including the cases where you would be better off buying something else. Vaping is intended for adult smokers and existing vapers. It is not risk-free, and nicotine is addictive, so if you do not already use nicotine, this is not a product to start with.

Rainbow flavour profile: what it tastes like

Rainbow is a fruit-candy flavour, and the easiest way to describe it is as a mixed bag of chewy fruit sweets rather than a single identifiable fruit. Most vapers who try it pick out a bright, slightly tangy citrus note, a sweet red-berry layer, and a softer tropical background that rounds everything off. No single fruit dominates, which is the point. The flavour is meant to taste like the whole packet instead of one colour from it.

Inhale: sweet and juicy, with a little sharpness from the citrus-style top note. There is no cooling agent in this flavour, so it does not carry the menthol chill of the ice variants in the wider range.

Exhale: a rounded fruit-candy finish. The sweetness lingers for a few seconds and tends to be more noticeable the tighter your airflow, because restricted draws concentrate the flavour. At higher wattage the flavour thins out slightly and the tangy edge becomes more pronounced.

Sweetness level: high. If you like your fruit flavours sharp and sour, Rainbow will probably be sweeter than you want. If you want sweet and juicy, it sits squarely in that territory. Sweet liquids leave more residue on coils, so expect to change your coil or pod a little sooner than you would with a tobacco or menthol liquid.

Consistency: candy-style flavours rely on blending several fruit notes, so the balance can shift a little as a coil ages. A fresh coil shows the full spread of flavours. A tired coil tends to collapse the profile into a generic sweetness, which is usually the sign that it is time for a new pod rather than a sign that the liquid has gone off.

Elux sells nic salts across a broad range, and Rainbow is one of several fruit-led choices. Flavours that have commonly appeared across the Elux salt line-up include:

• Blue Razz Lemonade: sweet blue raspberry with a lemonade lift
• Strawberry Watermelon: a juicy, light summer fruit pairing
• Cherry Cola: fizzy cola with a dark cherry note
• Triple Mango: ripe, heavy tropical mango
• Watermelon Ice: watermelon with a clear menthol chill
• Blueberry Sour Raspberry: tart berry over a sweet base
• Pink Lemonade: citrus with a berry edge

Stock and exact flavour names change over time, so check the shop page for what is currently available. If Rainbow turns out to be sweeter than you like, the sharper berry and lemonade options are the natural next step. If you want something cooler, the ice variants suit that better.

How 20mg nic salts perform: throat hit, vapour and puff delivery

Because this is a liquid rather than a finished device, performance depends partly on the hardware you pair it with, but the liquid itself behaves in predictable ways. Nic salts at 20mg are designed for low-wattage, mouth-to-lung vaping. You draw slowly for two to four seconds into your mouth, hold briefly, then inhale. The vapour is lighter and thinner than the dense clouds associated with sub-ohm vaping, and the aim is nicotine delivery and flavour rather than volume.

Throat hit. Salt nicotine is buffered with an organic acid, commonly benzoic acid, which lowers the pH of the liquid. That is why 20mg salt feels noticeably softer than 20mg freebase would. Expect a gentle, rounded sensation at the back of the throat, with a little more bite as you raise the wattage. Former smokers often describe it as a familiar tap without the scratchiness. If you have never used nicotine, 20mg may still feel strong even though it is smooth, because smoothness hides how much nicotine you are taking in.

Nicotine delivery. Nicotine salts are generally reported to deliver nicotine more efficiently than freebase at the same strength, which is why a smoker switching to salts often needs fewer puffs to feel satisfied. That efficiency is the reason salts are sold at 10mg to 20mg, while freebase liquids for higher-power devices are usually 3mg to 6mg.

Puff delivery. A liquid does not carry a puff count the way a sealed device does, but you can reason it out. Single-use devices of the 600-puff class held around 2ml of liquid. A 10ml bottle therefore holds the equivalent of roughly five of those, which puts a realistic yield in the region of 2,500 to 3,500 puffs from one bottle in a low-power pod device. Your real number will move up or down depending on several things:

• Wattage: higher power uses more liquid per puff
• Draw length: longer, harder pulls consume more
• Coil condition: a fresh coil vaporises efficiently, a gunked one wastes liquid
• Pod capacity: UK rules cap refillable tanks and pods at 2ml, so you will refill several times per bottle
• Usage pattern: constant chain vaping empties a bottle far faster than a few puffs here and there

Vapour production. Expect modest, flavour-forward vapour. If cloud size matters to you, a 20mg salt is the wrong tool, and a lower-strength freebase liquid in a higher-power device is the usual choice.

Coil technology and device compatibility

Rainbow 20mg salts are formulated for devices that run at low power. Matching the liquid to the right hardware is the biggest single factor in how the experience turns out, so it is worth getting the coil and settings right.

Resistance and wattage. Look for a coil between roughly 0.6 and 1.2 ohm, running at about 8W to 20W. Most pod systems handle this for you with a fixed output or a narrow adjustable range. A 1.0 ohm coil at 10W to 12W is a sensible starting point for a salt liquid of this type. As a rough pairing guide, always checking the range printed on the pod itself:

• 0.6 ohm mesh: around 14W to 18W
• 0.8 ohm: around 12W to 15W
• 1.0 ohm: around 10W to 13W
• 1.2 ohm: around 8W to 11W

Mesh coils. A mesh coil is a flat or cylindrical sheet of perforated metal rather than a wire wrapped round cotton. It has a larger heating surface, so it ramps up quickly, heats evenly and gives clear flavour separation, which suits a layered candy profile like Rainbow. The trade-off is that sweet liquids caramelise on the mesh, so plan to replace pods every one to two weeks of regular use.

Cotton-wicked round coils. A traditional wire coil in cotton still works well at 1.0 ohm and above. Flavour is slightly softer than mesh and wicking is forgiving at low power, though it can be prone to dry hits if you chain vape.

Ceramic coils. Ceramic wicks last a long time and resist burning, but they warm up more slowly and can mute fine flavour detail. They work, but most people choosing a fruit-candy flavour prefer mesh.

Devices that suit it. Refillable pod kits from brands such as SMOK, Vaporesso, Uwell, OXVA and Voopoo are the usual match, as are small mouth-to-lung tanks with a tight airflow. Look for a kit with a top-fill or side-fill port and a 2ml pod.

What to avoid. Do not use 20mg salts in a sub-ohm tank with a coil below 0.5 ohm at 40W or more. At that power the liquid is consumed very quickly, delivers far more nicotine per puff than a salt is designed for, and can cause nausea and headaches. It will also taste harsh and scorched. Keep the airflow tight too, since wide-open airflow dilutes the flavour and thins the throat hit.

Bottle design, build quality and storage

With an e-liquid, design means the bottle and its closures. Elux nic salts come in a 10ml plastic bottle with a narrow nozzle that lets you place a drop precisely into a small fill port. The nozzle matters more than it sounds. Pod fill ports are often only a few millimetres wide, and a thick tip makes spills and flooded airways far more likely.

Every bottle sold in the UK has to meet packaging and labelling rules, so you should expect the following on the bottle you receive:

• A child-resistant cap with a tamper-evident seal ring
• A health warning stating that the product contains nicotine, a highly addictive substance
• An ingredients list and the nicotine strength clearly shown
• A batch number and an expiry date
• Supplier contact details and a notification of the product to the UK regulator

Checking your bottle on arrival. Before you use it, confirm that the tamper ring is intact, the cap is tight, the label is legible and there is no liquid in the outer packaging. If anything looks wrong, do not use it, and contact us with your order number and a photo.

Storing it. Keep the bottle upright, in a cool, dark place away from direct sunlight and radiators. Heat and light break down flavour compounds and nicotine over time, which is why a bottle left on a car dashboard tends to darken and taste flat. Nicotine liquid darkening slightly with age is normal and is not a safety problem on its own, but a strong change in smell or colour is a reason to discard it.

Child and pet safety. Nicotine liquid is harmful if swallowed or absorbed through the skin, and a sweet fruit flavour is attractive to children and animals. Store it out of reach, and wipe up spills straight away. If liquid gets on your skin, wash it off with soap and water.

Recycling. Empty bottles go in household plastic recycling in some council areas, but policy varies, so check your local authority. Many vape retailers and household waste recycling centres also take bottles, empty pods and devices at drop-off points. Never put batteries or vape devices in a normal bin, because lithium cells can start fires in refuse vehicles.

Battery and charging: what your device needs

This product is a liquid, so it has no battery and nothing to charge. Battery life and charging are all about the device you put it in. Because the two work together, it helps to understand how much liquid a device battery can realistically use.

Pod kits typically carry batteries between about 400mAh and 1,000mAh, with compact devices at the low end and larger pen-style kits at the high end. You can estimate the number of puffs per charge from simple physics. Multiply the capacity in mAh by 3.7 volts to get milliwatt-hours, then convert to joules. An 800mAh battery stores around 10,600 joules. A three-second puff at 12W uses about 36 joules. That works out at roughly 250 to 300 puffs per charge once you allow for losses, which is in line with what most vapers see.

Applied to this bottle, 10ml at roughly 3,000 puffs means you will recharge a pod kit of that size about ten times per bottle. That is also why a device with a bigger battery is a practical choice if you vape heavily. A small 400mAh to 500mAh kit may need charging daily.

Charging habits that extend battery life and reduce risk:

• Use a USB-C cable and a standard 5V wall charger or a computer port, rather than an unknown high-output charger
• Do not charge overnight or leave a device charging unattended
• Do not charge a device that is hot, swollen, wet or visibly damaged
• Avoid leaving a device in a hot car or in direct sunlight
• Do not carry a loose device in a pocket with keys or coins
• Let the battery drop below full a few times, rather than keeping it topped up at 100% all day

Matching battery to output. Higher wattage drains a battery faster. A device running at 18W will take noticeably fewer puffs from one charge than one running at 10W. If you find yourself charging two or three times a day, try lowering the power or choosing a coil with a higher resistance, which is also kinder to the liquid.

Battery safety and disposal. A swollen, hot or leaking battery should be taken out of use at once. Spent devices and cells belong in a designated battery or electrical waste collection point, not a general or recycling bin. Most vape retailers and many supermarkets and council sites run drop-off points for exactly this purpose.

Choosing nicotine strength: when 20mg is right and when it is not

This listing is the 20mg/ml version, which is the highest strength you can legally buy in the UK. It is a good match for some people and too much for others, so it is worth working through your own situation before you buy.

20mg usually suits:

• Smokers who have around ten or more cigarettes a day and want to stop smoking
• Former users of 20mg disposable vapes, who are used to that strength
• People who vape only a few times a day and want each puff to satisfy quickly
• Those using a very low-power pod kit with small, short puffs

A lower strength, such as 10mg or 12mg, usually suits:

• Lighter smokers or people who smoke socially
• Those who vape constantly through the day, since a high strength accumulates quickly
• People who find 20mg too harsh or who feel lightheaded after a few puffs
• Anyone using a higher-power device, since more vapour per puff means more nicotine per puff

The most useful rule is to start at the lowest strength that stops you wanting a cigarette, not at the highest strength available. Going too high produces the symptoms of nicotine overload: dizziness, nausea, a racing heart, sweating and headaches. If that happens, stop vaping, drink some water, get some fresh air and wait for it to pass. Next time use a lower strength or take fewer puffs.

Chain vaping warning. People who move from cigarettes sometimes vape constantly, because there is no natural end to a puff the way there is with a cigarette. A 10ml bottle of 20mg contains 200mg of nicotine in total, so a bottle that vanishes in two or three days is a signal that the strength may be too high or that you are using it out of habit.

UK limits. Nicotine e-liquid in the UK is capped at 20mg/ml and 10ml per bottle, and refillable tanks and pods are capped at 2ml. These caps are the reason you see 10ml bottles everywhere. If you want to blend a lower strength, mixing with a nicotine-free base is possible, but it changes the flavour and the viscosity, and it is not worth the trouble when lower-strength bottles exist.

Nicotine is not suitable for pregnant or breastfeeding women, people under 18, or non-smokers. If you have a heart condition, high blood pressure or diabetes, speak to your GP before using nicotine products.

Who Elux Rainbow 20mg is for, and who should skip it

No single liquid suits everyone. Here is an honest rundown of who gets the most from this bottle and who is better off choosing something else.

It is a good fit if you:

• Are an adult smoker looking to switch from cigarettes to vaping
• Used 20mg disposable vapes and want a refillable alternative that gives a similar experience at lower running cost
• Enjoy sweet, candy-style fruit flavours more than menthol, tobacco or dessert profiles
• Already own a pod kit or mouth-to-lung tank and want a flavour to fill it with
• Prefer a thin, discreet vapour over big clouds

You should skip it, or think twice, if you:

• Are under 18. It is illegal to sell nicotine products to you and illegal for adults to buy them for you
• Do not smoke or vape already. Starting nicotine is not advisable, and this strength is a lot for a beginner
• Are pregnant or breastfeeding. Speak to a stop-smoking adviser about licensed alternatives
• Prefer sharp, sour or savoury flavours. Rainbow leans sweet and may feel cloying
• Want large clouds. A 20mg salt is not intended for high-power sub-ohm devices
• Want a zero-effort option. This needs a device, a pod, a charger and occasional coil changes
• Are sensitive to nicotine. A lower strength, or a nicotine-free liquid, will be more comfortable

If you are switching from smoking. The most common reason switching attempts fail is under-dosing nicotine in the first week. People pick a strength that is too low, keep craving a cigarette and go back. At the same time, picking something too high and feeling ill in the first hour has the same effect. If you smoke around a pack a day, 20mg in a low-power pod is a reasonable starting point. If you smoke far fewer, start at 10mg or 12mg. Free local stop-smoking services in the UK can provide behavioural support and can advise on combining vaping with other approaches.

If you are coming from disposables. The adjustments are small but real. You now fill a pod, change the coil, and charge the device. Once that routine is in place, most people find it less wasteful and noticeably cheaper per ml than buying sealed devices.

How to fill, prime and use it

Using a refillable pod is simple once you have done it a couple of times. These steps assume a standard pod kit with a top-fill or side-fill port.

1. Turn the device off or remove the pod. Many kits fire on inhalation, so take the pod out before filling to avoid accidentally firing a coil with no liquid on it.

2. Open the fill port. Pull back the silicone bung or slide the cover open, following the instructions for your specific pod.

3. Fill slowly. Tilt the pod and place the bottle nozzle against the fill port. Squeeze gently and let the liquid run down the inside wall rather than straight onto the centre post. Stop at or just below the maximum fill line. Never fill past the line and never cover the central air tube, since this is the airway.

4. Close and wipe. Press the bung back in fully and wipe away any liquid from the outside of the pod. Nicotine on your fingers can be absorbed through the skin.

5. Prime the coil. This is the step most people skip, and it is the main cause of burnt first hits. Leave the filled pod standing upright for five to ten minutes so the wicking material can soak up the liquid. A fresh mesh coil usually needs the longer end of that range. Then take two or three dry, unpowered draws if your kit allows it, or take a couple of short, gentle puffs at the lowest power.

6. Start low. Begin at the lower end of the wattage range and work up in small steps until the flavour is full without the vapour feeling hot. Most people settle in the middle of the pod's recommended range.

7. Pace yourself. Take one slow draw of two to four seconds, then wait 20 to 30 seconds before the next. Leaving time between puffs lets the wick re-saturate and keeps the coil lasting longer.

A few habits that keep things trouble-free:

• Fill when the pod is about a quarter full rather than letting it run completely dry
• Keep the device upright when not in use
• Do not mix different flavours in one pod, since the residue will confuse the taste
• Wipe the mouthpiece and contacts regularly
• Rinse and fully dry a pod before changing flavour, or use a fresh one

Troubleshooting common problems

Most problems with a salt liquid come from the device or the technique, not the liquid. Here are the issues vapers meet most often and what to do about each.

Burnt or scorched taste. This is nearly always a dry or old coil. Check the liquid level, allow longer priming time after refilling, and lower the wattage. If the taste persists after a fresh fill and a proper prime, the coil is spent and the pod should be replaced. Sweet fruit-candy liquids are harder on coils than lighter flavours, so a burnt taste can show up sooner.

Weak or flat flavour. Check three things in order. First, the coil age. Second, whether you have developed vaper's tongue, a temporary dulling of taste caused by vaping the same flavour all day; a few hours with water and a different flavour reset it. Third, the wattage. Too low and the flavour is faint, too high and it burns off.

Leaking from the pod. Overfilling is the usual cause, along with a bung that is not fully seated and a pod that has been left on its side. Fill to the line, press the bung home, wipe the pod and keep it upright. Changes in air pressure, such as flying or driving over a hill, can also push liquid out of an over-full pod.

Gurgling or spitting. This means liquid has flooded the airway or the coil chamber. Remove the pod, blow gently through the mouthpiece to clear it, wipe it and let it stand. Refill less next time.

Dry hits. A hot, harsh puff with little vapour is a dry hit. Stop vaping, let the coil re-saturate for several minutes and reduce the power. Long, hard pulls and chain vaping are the most common triggers.

Harsh throat hit. If the throat hit feels scratchy rather than smooth, it is probably too much power, too much nicotine for your habits, or a coil that is starting to burn. Lower the wattage first, then consider a lower strength.

Device will not fire. Check the battery, wipe the contacts between pod and battery, make sure the pod is seated firmly and check for liquid in the airflow path. A low-battery indicator that flashes usually means the device needs charging.

Liquid will not come out of the bottle. Squeeze the bottle gently and hold it fully upside down. If the nozzle is blocked, remove it, rinse it in warm water, dry it and refit it.

Nausea, dizziness or a racing heart. These are signs of too much nicotine. Stop vaping and see the strength guidance above.

Value for money

The honest way to judge value is cost per millilitre and cost per day, not the price tag of a single item. Check the current price on this page, since it changes with offers and multi-buy deals, and then use the arithmetic below with your own figure.

Nicotine salt bottles in the 10ml size generally sit in the low single digits of pounds in the UK, and many shops run multi-buy discounts that bring the unit price down. A bottle in that range works out at about 30p to 50p per millilitre. Before the single-use ban, a 2ml disposable cost somewhere around five to six pounds, which is roughly £2.50 to £3.00 per millilitre. On liquid alone, refilling is several times cheaper.

That is not the whole story, because you also have running costs the disposable never had:

• The device: a refillable pod kit generally costs between about £10 and £30 as a one-off
• Replacement pods or coils: typically a few pounds for a pack, lasting one to two weeks each in regular use
• Charging: negligible, a few pence a month

Here is a worked comparison. Suppose you use one bottle every two weeks. That is £3 to £5 on liquid plus a few pounds on a pod, so around £6 to £10 per fortnight, or £12 to £20 a month. Someone getting through a disposable every three days was spending something like £50 or more per month on devices. The saving in the first month is smaller once you have bought the kit, but it pays back quickly.

What you get for the price. The 10ml size delivers roughly 2,500 to 3,500 puffs, a flavour that has been tuned by a brand with a large product range behind it, and nic salt smoothness at the highest legal strength. You are not paying for a battery you will throw away, which is both a saving and a reduction in waste.

Where the value is weaker. If you only vape occasionally, a bottle may last long enough that the liquid ages before you finish it. If you dislike the flavour after a few days, you have spent money on a bottle you do not want. For that reason it can be worth buying one bottle first rather than a large multi-pack, and adding more once you know Rainbow suits you.

Buying tips. Compare cost per ml rather than headline price, look for multi-buy offers if you are already sure about the flavour, and watch the expiry date on larger orders.

How Elux Rainbow compares with other nic salts

Elux is one of several brands selling 10ml, 20mg nic salts in a fruit-led style. Here is how it compares fairly with the names you are most likely to see alongside it. Taste is personal, so treat these as general tendencies rather than rules.

IVG Salts. IVG offers a very wide flavour list and a long track record in 10ml salts, with prices that are usually close to Elux. If you want more flavour variety, such as a broader set of dessert and tobacco options, IVG has more depth. Elux tends to concentrate on the fruit, candy and ice profiles that people knew from its devices.

Elfliq by Elf Bar. Elfliq is the closest comparison in spirit, a 10ml salt range from another disposable brand. If you liked a flavour from a particular device, the liquid sibling of that brand is the more likely match, so the real question is which brand's flavour you already prefer. Both sit at similar prices.

Nasty Salt. Nasty has a reputation for bolder, punchier fruit and menthol blends. If Rainbow reads as too soft or too sweet for you, Nasty is a reasonable thing to try. It can be a little more intense on the throat.

Dinner Lady Salts. Dinner Lady is better known for desserts and layered fruit profiles. If you prefer a creamy or pastry-style flavour over candy, it is the stronger candidate. For pure fruit candy, Elux Rainbow is more direct.

Pod Salt. Pod Salt often costs a little more per bottle and is known for a consistent, clean flavour. If you value that over a lower price, it is worth a look.

Hayati and Lost Mary liquids. These follow the same disposable-to-liquid pattern as Elux, with similar bottle sizes and strengths. Differences come down to the flavours on offer and your own preference.

In practice, no one of these ranges holds a clear technical lead at the same nicotine strength. The differences that matter are flavour accuracy, sweetness level, how quickly the liquid gunks a coil and price. Rainbow's strengths are a straightforward, recognisable candy profile at a typical price and a widely available brand. Its weaknesses are that it is quite sweet, it comes in a single legal-maximum strength on this listing and there are brands with a wider choice of non-fruit flavours.

A sensible approach. If you are unsure, buy one bottle of Rainbow and one from a rival range at the same strength, and compare them in the same device over a few days. It costs a few pounds and removes the guesswork.