Rainbow Wave Caliypso 100ml Shortfill E-Liquid

Overview

The Rainbow Wave Caliypso 100ml Shortfill E-Liquid by Caliypso in Rainbow Wave at 0mg. Free UK delivery over £20, same-day dispatch on weekday orders before 4pm.

Caliypso Rainbow Wave 100ml Shortfill at a Glance

Caliypso Rainbow Wave 100ml Shortfill E-Liquid is a bottle of nicotine-free vape liquid priced at £7.99 and sold in a single 0mg strength. It is not a device, and it does not plug in, charge or puff on its own. It is liquid, designed to be poured into a refillable tank or pod, and it belongs to the Wave group inside the wider Caliypso brand range.

The format matters more than the flavour name when you are deciding whether this is the right purchase. A shortfill is a large bottle that is deliberately left part empty. The liquid inside carries no nicotine, and the spare room at the top exists so that an adult who wants nicotine can add one or more separate 10ml nicotine shots and shake the bottle to blend. If you want no nicotine at all, you leave the bottle alone and vape it as supplied. Both routes are normal and both are legitimate.

This page is a buyer's guide rather than a sales pitch. We cover the flavour name and what can honestly be said about it, how the 100ml format works, where Rainbow Wave sits among its Caliypso siblings, who it suits, the numbers in the listing, how to add nicotine and work out a strength, which hardware copes with thick liquid, storage, common problems, and delivery and age checks.

Where the listing is silent, we say so. The exact VG to PG ratio, the true liquid volume and any official tasting notes are not given in our product data, so we do not invent them. The printed label on the bottle is the authority on those points, and it is worth reading before you fill a tank.

If you are comparing options, the full shortfill e-liquid collection shows how this bottle stacks up on price and size against other brands. In short, it suits adults who already own refillable kit, who want a big bottle for a modest price, and who are happy to pick their own nicotine level or skip it altogether.

What the Rainbow Name Does and Does Not Tell You

What does a flavour called Rainbow actually taste like? That is the fair question, and the honest answer is that our listing does not say. The product carries the flavour name Rainbow Wave and no flavour tags, and there are no official tasting notes in the data we hold. Anyone who tells you exactly which fruits are in the bottle, without the manufacturer's description in front of them, is guessing.

What we can offer is context. Across the vaping market, 'rainbow' is a name usually given to blends that combine several fruity or sweet notes rather than one single fruit. Think of the multicoloured sweets the word brings to mind: sugary, bright and a little playful. That is a general convention rather than a promise about this particular bottle, so treat it as a reasonable expectation and not a guarantee.

The name contrasts usefully with its siblings. Orange Wave points at orange. Pink Wave, Blue Wave and Green Wave point at colours that tend to hint at a type of fruit. Rainbow cannot point at a single thing, which is why it is often the most open-ended entry in any colour-coded line. If you like variety inside a single puff, that is appealing. If you prefer one clear, singular flavour, a single-colour bottle may be easier to predict.

Several things you control will change how it tastes. A lower-powered, cooler draw tends to keep sweet blends rounded and gentle, while a hotter draw can push sweetness forward and flatten the finer notes. A fresh, well-primed coil shows more flavour than a tired one. Airflow plays a part too: a tighter draw concentrates the taste, and a wide-open draw spreads it out.

Nor should you expect a cooling or menthol edge unless the label says so. Caliypso also sells a bottle called Cold Wave, so the word Wave on its own should not be read as a promise of ice. If you want to explore more profiles before choosing, browse the wider e-liquids collection and compare tasting notes from several brands.

How the 100ml Shortfill Format Works

A 100ml label and 100ml of liquid are not the same thing, and that gap is the whole point of a shortfill. UK rules treat nicotine-containing e-liquid differently from nicotine-free liquid. As a general principle, liquid that contains nicotine is sold in bottles of no more than 10ml, at a maximum of 20mg/ml, and refillable tanks are limited to 2ml. Nicotine-free liquid is not bound by the small-bottle limit, so a maker can fill a large bottle with 0mg liquid and leave room at the top.

That room is useful. Remove the cap, add one or two separate 10ml nicotine shots, refit the lid and shake, and you have a large bottle of liquid at a strength you chose yourself. The nicotine comes from a different product, so the shortfill stays at 0mg on the shelf and in the post.

How much liquid is really in the Rainbow Wave bottle? The listing does not give a figure, and it can vary between bottle designs. In shortfills of this style the liquid is commonly somewhere around 70ml to 80ml, which leaves between 20ml and 30ml free. Treat that as a rule of thumb only. The label on your bottle states the true volume, and that is the number to use for any calculation.

The bottle is typically soft plastic with a long, narrow nozzle. That nozzle is built for small tank openings and pod ports, so you can fill without spilling. Check whether your cap is child-resistant, and store the bottle out of reach either way.

Because you fill the hardware yourself, a shortfill gives you control that a sealed disposable never will. You decide how much goes into the tank, when to top up and whether to add nicotine at all. The trade-off is effort. You need compatible kit, a little patience and a clean surface to work on, and you should be comfortable handling liquid carefully. For many adults who vape every day, that small effort is a fair price for a large bottle at a sensible cost per millilitre.

Where Rainbow Wave Sits in the Caliypso Range

Walk through the Caliypso catalogue and a pattern appears quickly. At the time of writing we list 37 Caliypso products, and every one of them is priced at £7.99 and supplied at 0mg. With cost and strength fixed, flavour is the only real variable between bottles, which makes choosing simpler than it first looks.

The names fall into four families: Surf, Wave, Ocean Lemonade and plain Lemonade. Rainbow Wave belongs to the Wave group, whose colours in our listing are Black, Blue, Cold, Green, Orange, Pink, Purple, Rainbow, Red and Yellow. The Surf group repeats the colour idea, and Rainbow also appears there as Caliypso Rainbow Surf, alongside a Rainbow Ocean Lemonade. The lemonade bottles lean on a soft-drink theme instead, with names built around lemon, cherry, pineapple, strawberry, mango and melon.

Brand-wide, the flavour tags we hold include lemonade, lemon, orange, cherry, ice, lime, pineapple, apple, strawberry, mixed berries, mango and tropical fruit. That tells you Caliypso is a fruit and soft-drink range overall. Our data carries no flavour tag for Rainbow Wave itself, which is another reason to be careful about describing its profile too precisely.

A practical way to use this structure is to treat Rainbow Wave as a starting point. If you enjoy it, try the Surf version to see how much the two share. If it feels too sweet for your taste, one of the lemonade bottles offers a sharper, more refreshing angle. Because every bottle costs the same, there is no price penalty for experimenting with a second flavour once the first runs low.

It is also worth remembering that a bottle this size will last most people several weeks. Choosing a flavour you can live with day after day matters more than chasing novelty, so if you are unsure, a flavour with a clear, easy-to-predict identity may be a safer first choice than a mixed one, and Rainbow Wave can follow as your second bottle.

Who Rainbow Wave Suits, and Who Should Look Elsewhere

Start with the person rather than the product. A 100ml shortfill suits an adult who already vapes most days, owns a refillable tank or pod, and does not mind filling it by hand. Daily vapers get through liquid quickly, so a large bottle at a modest price is practical.

It is also a natural choice for people vaping at 0mg. Some adults who have moved away from smoking step their nicotine down over time until they are using nicotine-free liquid for habit and flavour alone. For them there is nothing to mix, nothing to measure and nothing to calculate. They fill the tank and carry on. The nicotine-free e-liquids collection gathers the other 0mg options in one place if you want to compare.

A third group is the home mixer. If you have settled on a nicotine level that works for you, a shortfill plus shots gives you a big bottle at exactly that strength, which can work out better value than buying several small ones. Fans of sweet, multi-fruit styles are the obvious audience for a Rainbow flavour, though your own taste is the real test.

Who should look elsewhere? Complete beginners who want something ready to use will find a shortfill is the wrong shape of product, because it cannot be used without hardware. A pre-filled option is simpler, and our disposable vapes range needs no filling, charging or mixing. Anyone who wants a nicotine-containing product straight out of the box will also be disappointed, since this bottle is 0mg as supplied. And if you dislike very sweet flavours, a multi-fruit profile may simply not suit you.

Finally, this product is strictly for adults aged 18 or over. It is not for non-smokers or young people. Nicotine is addictive, and for anyone who does not currently use it, the sensible decision is not to start.

Specs and Value Maths From the Listing

Here is what the listing states, line by line, followed by the sums that matter when you compare value.

• Brand: Caliypso
• Product: 100ml shortfill e-liquid, Rainbow Wave
• Strength as supplied: 0mg, nicotine-free
• Bottle size: 100ml, with headroom for nicotine shots
• Price: £7.99 per bottle
• Flavour: Rainbow Wave, with no flavour tag in our data
• Format: refill liquid for tanks and refillable pods, not a device

Some details are absent, and we would rather say so than guess. The VG to PG ratio, the true liquid volume and any official tasting notes are not stated in our data. Check the printed label when the bottle arrives, along with the batch code and best-before date.

Now the value sums. If your bottle holds 70ml of liquid, £7.99 works out at about 11.4p per millilitre. At 80ml it is about 10.0p per millilitre. For comparison, a multibuy of 10ml bottles such as five for £10 comes to £2 a bottle, which is 20p per millilitre if each bottle holds 10ml. Per millilitre, then, a shortfill is usually the cheaper route, though adding nicotine shots raises the cost, because each shot is a separate purchase.

Buying more than one bottle changes the picture again. Two bottles come to £15.98 and three come to £23.97, which crosses the free delivery line discussed in the delivery section further down this page. If you like to plan ahead, a three-bottle order in flavours you already know is the efficient way to stock a cupboard, while a first order is better kept to a single bottle until you know you enjoy it.

Adding Nicotine Shots Step by Step

Mixing nicotine takes about five minutes and rewards patience. This method assumes you are an adult who already uses nicotine and that your shots come from a reputable seller. If you plan to vape Rainbow Wave at 0mg, skip this section entirely.

• Step 1, read both labels. Note the liquid volume on your Rainbow Wave bottle and the strength and volume printed on the shot. You need both numbers for the sums in the next section.
• Step 2, set up a clean space. Work over a tray or kitchen roll, away from children and pets. Nicotine can be absorbed through the skin, so some people wear disposable gloves and wipe up spills straight away.
• Step 3, open the bottle. Take off the cap and, if it comes out, the nozzle insert. Keep the shot sealed until you are ready.
• Step 4, add the shot. Squeeze the contents into the bottle. Do not force in more than will fit, and stop if the liquid nears the neck.
• Step 5, refit and shake. Replace the nozzle and cap firmly, then shake for about thirty seconds, turning the bottle end over end so the nicotine blends through the thick liquid.
• Step 6, rest it. Leave the bottle upright for a few hours, or overnight if you can. Bubbles settle and the mix evens out.
• Step 7, label it. Write the new strength and the date on the bottle with a marker or sticker, so nobody mistakes it for nicotine-free liquid.

Never add shots directly to a tank or pod, and never mix nicotine in a container that is not clearly marked. A mixed bottle should be stored and treated like any other nicotine product from that point on. If you spill neat nicotine on your skin, wash the area with soap and water straight away.

Working Out Your Strength: The Sums

Strength is arithmetic, not guesswork. The formula is short: multiply the number of shots by the shot volume and the shot strength, then divide by the total volume of the finished bottle. In words, strength in mg/ml equals shots times 10ml times shot strength, divided by the final millilitres in the bottle.

These examples assume 10ml shots at 18mg/ml, which is a common UK strength. Your shots may differ, so check the label before you start.

• 70ml of liquid plus one shot: 180mg in 80ml gives roughly 2.25mg/ml.
• 70ml plus two shots: 360mg in 90ml gives 4mg/ml.
• 70ml plus three shots: 540mg in 100ml gives 5.4mg/ml.
• 80ml plus one shot: 180mg in 90ml gives 2mg/ml.
• 80ml plus two shots: 360mg in 100ml gives 3.6mg/ml.

With 20mg/ml shots, each shot adds 200mg instead of 180mg, so 80ml plus two shots gives 400mg in 100ml, or 4mg/ml.

How do you pick a target? Strength is personal, and there is no single right figure. Vapers using a wide-open sub-ohm tank usually go lower, because they draw a large amount of liquid with each puff. People using tighter pod devices often prefer a higher mg/ml because each puff is smaller. Those are tendencies, not rules. Start lower than you think you need, since you can always add another shot later but cannot easily take one out.

Remember, too, that the finished volume matters. Adding shots dilutes the flavour as well as the VG and PG, so heavily diluted bottles can taste a little thinner than the same liquid at 0mg. If the flavour seems muted after mixing, dilution may be the reason, and using fewer shots at a higher shot strength can help keep the total volume down.

Tanks, Pods and Coils That Suit Rainbow Wave

Thick liquid needs hardware that can keep up with it. Large shortfills are often made with a high proportion of VG, which gives a smoother, denser liquid, though the listing does not confirm the ratio for this bottle. Denser liquid wicks more slowly, so the best matches are tanks and coils built for generous flow.

Sub-ohm tanks are the classic partner. They take low-resistance coils with large wicking holes, and mesh coils cope particularly well with thicker liquid. If you are starting from nothing, our vape kits collection includes complete sets with the tank, battery and charger together, which saves you matching components yourself.

Refillable pods are the other route. Many pod systems take open liquid, but some are tuned for thinner juice, so check the manufacturer's advice before pouring a dense bottle into a small pod. Browse the refillable vape pods to see what is available. A device that takes pods you fill yourself is usually suitable. A closed system sealed to a particular pre-filled cartridge generally is not.

Coils are a consumable, and sweet, multi-fruit liquids can leave more residue on them than a plain tobacco or menthol liquid would, so you may find yourself changing coils a little more often. Signs that a coil is tired include muted flavour, a faint burnt note and gurgling. Keep spares from the coils collection so you are never caught short.

When you first fill, give a fresh coil five to ten minutes to soak before the first puff, and take a couple of gentle, unpowered draws to help the wick fill. Priming this way prevents the dry hit that ruins a new coil in seconds. Keep the power within the range printed on the coil, begin at the lower end and nudge it up until the flavour sits where you like it. Never fill past the maximum line, and leave a little air space at the top of the tank.

Storage, Shaking and Everyday Care

E-liquid is perishable in a quiet way. Heat, light and air all change colour and flavour over time, usually so gradually that you only notice when a bottle that tasted bright last month tastes flat.

Store the bottle upright with the cap tightly closed, somewhere cool, dry and out of direct sunlight. A cupboard or drawer is better than a windowsill, a bathroom shelf or a car glovebox. Warmth can dull sweet, fruity flavours and soften plastic, while strong sunlight can darken the liquid.

Keep it away from children and pets without exception. That applies to a 0mg bottle, and it applies with extra force to any bottle that has had nicotine added. A child-resistant cap is a helpful backup, not a substitute for putting the bottle somewhere out of reach.

Shake gently before each fill. Higher-VG liquids can settle slightly over time, and a quick shake redistributes the flavour. If you have added shots, shake again to keep the nicotine evenly spread. Wipe the nozzle after filling, because residue attracts dust and can creep into the cap threads.

How long does an opened bottle stay at its best? There is no single answer, but a few months is a sensible planning window for most fruit flavours, provided the bottle is stored well. Check the best-before date printed on the label, which is the manufacturer's guide. If the liquid smells odd or looks cloudy, do not use it.

Finally, keep your hardware tidy. Rinse tanks and pods with warm water when you change flavour, let them dry fully and fill with fresh liquid. Mixing a sticky multi-fruit liquid with leftovers of something else tends to produce a muddled taste, which is easy to avoid with a quick wash.

Pros, Cons and Troubleshooting for Rainbow Wave

Every product has trade-offs, so here is an honest account of both sides before you buy.

The advantages

• Large 100ml format at a modest price of £7.99.
• Supplied nicotine-free, so it suits 0mg vapers with no extra steps.
• Room for nicotine shots if you want to set your own strength.
• A multi-fruit style name for people who enjoy variety.
• Part of a range where every bottle costs the same, so trying another flavour carries no price penalty.

The drawbacks

• It needs refillable hardware, which puts off beginners who want something ready to use.
• Mixing nicotine takes time and care.
• The listing does not state the VG to PG ratio, the true volume or any tasting notes.
• A big bottle commits you to one flavour for weeks, which is a risk if you turn out not to enjoy it.

Common problems and fixes. A burnt or harsh taste usually means a tired coil or a dry wick, so change the coil, prime it properly and lower the power. A gurgling sound or a leaking tank often points to overfilling, a loose seal or a flooded coil, so fill below the maximum line, tighten the tank and wipe the base. Weak flavour after adding shots is usually dilution, so try fewer shots or let the bottle rest. Dry hits from a brand-new coil mean the wick has not soaked yet, so wait several minutes before vaping.

None of these quirks is unique to this bottle. They are the ordinary habits of refillable vaping, and most of them disappear once the hardware and the liquid are properly matched. If the taste still seems off after a fresh coil and a clean tank, check the batch code and best-before date on the label before blaming the liquid.

Delivery, Age Checks and Buying With Confidence

Before the parcel can leave us, an age check has to be passed. Rainbow Wave is an age-restricted product, and we sell only to adults aged 18 or over. Our age verification page explains how checks work and what you may be asked for, either at checkout or at the point of delivery. Read it before your first order so there are no surprises.

Delivery details are best taken from one place so they never go out of date. Our shipping information page lists services, charges and cut-off times. At the time of writing, UK orders over £20 qualify for free delivery and our dispatch cut-off is 4pm, but check the page for the current position. Three bottles at £7.99 come to £23.97, so a modest stock-up of flavours you already know would clear the free-delivery line.

When the parcel arrives, open it promptly and check the bottle. Look for an intact seal, a legible label with batch and best-before information, and no leaks. We sell genuine stock only, and every bottle should look and feel like a properly finished retail product. If something is wrong, do not use the liquid, and get in touch.

If you have a question that this page has not answered, our team can help through the contact page. Include your order number and, where relevant, a photo of the label or any damage, which speeds things up considerably.

A last practical point for first-timers: plan for the extras. A shortfill is only one part of a working set-up, so think about spare coils, a compatible tank or refillable pod, and, if you want nicotine, shots from a reputable seller. Having everything to hand means you can fill, prime and vape in a single sitting rather than waiting on a second parcel.