Rainbow Surf Caliypso 100ml Shortfill E-Liquid

Overview

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

Caliypso Rainbow Surf 100ml Shortfill at a Glance

Caliypso 100ml Shortfill E-Liquid Rainbow Surf is a nicotine-free vape juice in a large 100ml bottle, priced at £7.99 on this site. It belongs to the Caliypso range, a line of 37 listings that all share the same bottle size, the same 0mg strength and the same flat price. Choosing Rainbow Surf therefore means choosing a flavour name and nothing else. There are no strength menus, size tiers or bundle options to untangle on this page.

The product data gives us four firm facts: the name, the 100ml volume, the 0mg strength and the £7.99 price. It does not publish a full tasting description, a VG/PG ratio, a nicotine shot capacity or any flavour tags. This guide will not pretend otherwise. What it can do, section by section, is explain what a bottle of this type is, how it behaves in a device, how the numbers add up, and what to do if something goes wrong.

In plain terms this is a shortfill e-liquid. The bottle is sold nicotine-free but is not filled to the brim, which leaves room for adults who want a nicotine strength to add separate nicotine shots themselves. If you vape at 0mg, you ignore that headroom and use the liquid exactly as it arrives.

Who is this page for? Mostly three kinds of reader. There is the person refilling a tank or refillable pod who wants a big bottle at a low cost per millilitre. There is the shopper curious about the Rainbow name who wants to know what they are actually buying. And there is the newcomer to shortfills who needs the mechanics explained before opening a box. A quick summary of the listing:

• Brand: Caliypso
• Format: 100ml shortfill e-liquid bottle
• Strength as supplied: 0mg, nicotine-free
• Flavour name: Rainbow Surf
• Price: £7.99 per bottle
• Sold to adults aged 18 and over only

Everything else in this guide is either category-level explanation or a pointer to what the label on your bottle will tell you once it arrives.

How a Shortfill Bottle Actually Works

Why would a manufacturer sell a 100ml bottle that is deliberately not full? The answer is UK regulation, and once you see it the format makes sense. E-liquid containing nicotine cannot be sold in refill bottles larger than 10ml. Nicotine-free liquid is not held to that cap. So makers fill a large bottle with flavoured 0mg liquid, leave spare space at the top, and sell nicotine in separate small bottles that the customer can combine at home.

Those small bottles are called nicotine shots. They are sold separately, usually in 10ml sizes, and they are an optional extra rather than part of this product. A shot is mixed in by tipping it into the large bottle, closing the cap tightly and shaking. The label on the bottle carries the guidance on how much space is available and how many shots it can take. That label is the authority for your bottle, not any general rule of thumb you read online, including here.

For many buyers the nicotine step never happens. A 0mg shortfill is a complete product on its own for anyone who vapes without nicotine, and the headroom is simply unused air. Browsing the wider selection of nicotine-free e-liquids shows how common that choice is.

Three other points are worth knowing before you buy.

• Shortfills tend to be high-VG blends, built for tanks and devices that cope with thicker liquid. The label will confirm the real ratio for this bottle, since the listing does not state it.
• The nozzle is usually a narrow dropper tip designed to fit the small fill ports on tanks and refillable pods, so you can top up without a funnel.
• Because the bottle is large, you pour what you need into the device and keep the rest sealed. You never empty the whole thing in one go.

Think of the format as a bulk buy for vapers who already own a refillable device. It trades the convenience of a sealed pod for volume and a lower cost per millilitre, and it asks you to do a little more work at the point of use. The sections that follow cover that work in detail, starting with where this particular flavour sits in its range.

Where Rainbow Surf Sits in the Caliypso Range

Thirty-seven listings sounds like a large catalogue until you see how it is organised. The Caliypso collection on this site is built from four name families plus one plain base listing, and every one of them is a 100ml shortfill at 0mg for £7.99.

Here is the layout, based on the product names in our catalogue:

• Surf: eight bottles, namely Black, Blue, Cold, Green, Orange, Purple, Rainbow and Red.
• Wave: ten bottles, namely Black, Blue, Cold, Green, Orange, Pink, Purple, Rainbow, Red and Yellow.
• Ocean Lemonade: ten bottles, namely Black, Blue, Deep Blue, Green, Iceberg, Orange, Pink, Purple, Rainbow and Red.
• Named lemonades: eight bottles, namely Dark Cherry, Lemon and Lime, Original, Pineapple, Strawberry, Sweet Mango, Triple Melon and Tropical Punch.
• Base listing: one generic Caliypso 100ml shortfill with no flavour in its name.

Rainbow Surf is one of three Rainbow bottles. The other two are Rainbow Wave and Rainbow Ocean Lemonade. The same colour words, Black, Blue, Green, Orange, Purple and Red, recur across Surf, Wave and Ocean Lemonade, so a colour name alone does not identify a bottle. Whether Black Surf and Black Wave taste alike, or Rainbow Surf and Rainbow Wave, is not something the listings state, and we would not guess. What the structure does suggest is that the family word means something to the maker, so treat the full name as the identity of the product, not just the colour.

There is a practical upside to a range priced this evenly. Comparing flavours costs you nothing extra. If you try Rainbow Surf and like the general style, you can try a neighbour from the same family on the next order and the price difference is zero. If you are unsure about a flavour you cannot yet picture, order a single bottle first rather than stocking up on three of the same thing. A mixed order of different bottles is a cheap way to learn what you prefer, and it is the sensible approach with any range where the descriptions are thin.

What the Rainbow Surf Name Tells You About Flavour

Names in e-liquid are marketing first and description second, so it pays to separate what is known from what is merely suggested. The Caliypso Rainbow Surf listing gives us the name and nothing more. There is no tasting note from the manufacturer and no flavour tag attached, which means any page claiming to describe the exact taste is guessing.

What can be said is category-level. Across the wider market, bottles with Rainbow in the name often point to a blend of several fruits, or to a sweet, candy-style profile loosely modelled on multi-coloured sweets. That is a habit of naming rather than a rule, and the Caliypso listing does not confirm which approach applies here. The word Surf is a family label shared by eight bottles, including Black, Blue and Orange, none of which are obviously fruit names, so it is weak evidence about flavour too.

One small inference is worth flagging as an inference. The range has separate bottles called Cold Surf and Cold Wave. That hints that cooling, where it exists, is signposted in the name. Rainbow Surf carries no such word. It is a reasonable hint, not a statement from the maker, so check the label if a cooling sensation matters to you.

So how do you judge a flavour you cannot read about in advance? A few habits help:

• Read the label when the bottle arrives. It may list more than the web listing does.
• Use a fresh coil for the first tank. A worn coil flattens almost any flavour and will mislead you.
• Begin at the lower end of your device's recommended power range, because extra heat can turn a sweet liquid harsh.
• Give it a few days. Your palate adjusts after switching flavours, and a first impression is often unreliable.

Taste is personal and also depends on the device. Two people using the same bottle in different tanks can describe it quite differently. At £7.99 for 100ml the experiment is a modest one, and if you enjoy mixed or sweet styles in general it is a reasonable bottle to try.

Specs, Price and Cost Per Millilitre

Divide £7.99 by 100 and you get 7.99p per millilitre. That single figure is the main reason daily vapers move from small bottles to shortfills. For comparison, a 10ml bottle sold through the 5 for £10 multibuy works out at £2 each, which is 20p per millilitre, roughly two and a half times the cost of this bottle.

Because every Caliypso bottle carries the same price, the multiples are easy to work out:

• One bottle: £7.99 for 100ml
• Two bottles: £15.98 for 200ml
• Three bottles: £23.97 for 300ml
• Four bottles: £31.96 for 400ml

Delivery changes the picture slightly. Standard delivery is free on orders over £20 and costs £2.99 below that. Two bottles come to £15.98, so with delivery you would pay £18.97. Three bottles come to £23.97 with free standard delivery, which means the third bottle effectively adds only £5.00 to what the two-bottle order would have cost. If you were planning on two, it is worth doing that sum before you check out.

Turning volume into time is harder, because consumption varies enormously between people and between devices. Treat these as illustrations rather than promises. Someone using about 3ml a day would take just over a month to finish a bottle, spending roughly 24p a day. At 5ml a day it lasts about three weeks, near 40p a day. A heavy user at 8ml a day gets through it in around twelve days, closer to 64p a day. Sub-ohm style devices usually draw more liquid than small pod systems, so your setup matters as much as your habits.

Two cautions keep the arithmetic honest. First, if you add nicotine shots, those are bought separately and add to the total. Second, a low price per millilitre is only a bargain if you finish the bottle while it is in good condition and actually like the flavour. The listing shows no multibuy deal on this bottle, and prices can change, so check the product page for the figure that applies on the day you order.

Who Rainbow Surf Suits and Who Should Look Elsewhere

Start with the limitations, because they decide whether this bottle belongs in your basket at all. Rainbow Surf cannot be used straight from the box in a disposable vape, a sealed prefilled pod or any other closed system. It needs a refillable device. The bottle is large, so it is awkward to carry around, and the flavour is described only by its name on the listing, so you are buying partly on trust. It is also nicotine-free as supplied, so anyone wanting a strength has an extra purchase and a mixing step to deal with.

Now the upsides, which are mostly about value and flexibility:

• A low cost per millilitre, at 7.99p, compared with small bottles.
• One flat price across the range, so choosing a flavour never costs more or less.
• A strength you control. It stays at 0mg, or you can add shots if you choose to.
• It works with refillable tanks and pods you may already own.
• A single bottle lasts weeks for many people, which means fewer orders and less packaging.

The good fit is an adult who already has a refillable device, is comfortable filling it, and uses enough liquid each day that buying in bulk makes sense. It also suits someone who vapes at 0mg and therefore never needs to touch a nicotine shot.

The poorer fit is a complete beginner who wants no fuss. A sealed system is simpler to start with, because there is nothing to fill, prime or mix. People who want nicotine without a device or liquid handling at all sometimes look at nicotine pouches instead, which are a different product entirely and not interchangeable with e-liquid.

One last point. This page is written for adults who already vape. Sales are restricted to people aged 18 and over, and there is no reason for anyone who has never smoked or vaped to start with a 100ml bottle.

Devices That Take a 100ml Bottle

A 100ml bottle is only liquid. To use it you need something you can refill yourself, and that rules out a good deal of what is sold. Sealed disposable vapes and prefilled pod cartridges are made to be used and replaced, and they should not be opened or topped up from a bottle like this one.

Devices that do work fall into a few groups:

• Refillable tank kits. These pair a battery with a tank and replaceable coil. Browse the vape kits range to see the variety, from compact starter sets to larger sub-ohm style setups.
• Refillable pod systems. Many have a side-fill or top-fill port. The refillable vape pods collection lists pods you fill yourself.
• Existing kit you already own. If you have a tank or pod that accepts loose liquid, it will take this bottle too, provided the coil suits the liquid.

Two practical constraints apply in the UK. Tanks and pods are capped at 2ml of capacity, so you will refill often even though the bottle is big. And the bottle itself is only a supply, not a device, so pick the hardware first and the liquid second.

Matching liquid to coil matters more than most buyers expect. Shortfills lean towards high-VG blends, and thicker liquid wicks more slowly. Coils and tanks designed for it, often those with larger wicking holes, handle it comfortably. Pod systems built around very fine coils for thinner liquid can struggle, giving gurgling or dry hits. Most coil packs print a recommended VG range or power band, and that guidance is worth following.

As for upgrades and extras, the useful ones are boring. Keep a spare coil on hand, since a 100ml bottle can outlast several coils depending on use. A second tank or pod lets you swap flavours without cross-contamination. Beyond that, nothing extra is required. Whatever device you choose, check the label on the bottle and the device instructions before you pour.

Filling, Priming and Getting a Clean First Vape

Fill slowly and you will avoid most early problems. Set the device on a flat surface, have a tissue ready, and work in good light. The steps below suit most tanks and refillable pods, but your device manual always takes priority.

• Switch off and unscrew. Power the device down and open the tank or pod following the maker's instructions.
• Shake the bottle gently. A few turns of the wrist is plenty, particularly if it has been standing in storage.
• Aim for the wall. Tilt the tank and run the liquid down the inside glass or plastic, keeping the tip clear of the central chimney so you do not flood the airflow.
• Stop below the maximum line. Leave a little air at the top. Overfilling is a common cause of leaks.
• Close up and wipe. Check the threads are dry before you seal everything again.

Next comes priming, and it is the step people skip. A new coil is dry cotton. If you fire it before it has soaked, it will scorch and the taste will be spoiled for the life of that coil. Wait five to ten minutes after filling. Thicker liquid may need a little longer. Many people also put a few drops straight onto the cotton through the coil's wicking holes before fitting it, which speeds things up.

Then take a few gentle draws without pressing the fire button, to pull liquid in, before you vape in earnest. Start at the lower end of the recommended power range and move up in small steps. If you notice a harsh or burnt note, back off immediately.

Coil care follows from this. Sweet liquids can leave residue on the coil over time, which is why flavour fades gradually. When a clean tank no longer tastes right, replacement vape coils are the usual remedy, and swapping early is cheaper than persevering with a tired one. Rinse and dry the tank before changing flavour, and the next bottle will taste as intended.

Adding Nicotine Shots and Choosing a Strength

Everything here applies only if you choose to add nicotine. Rainbow Surf is 0mg as supplied, and plenty of people leave it that way. If you do want a strength, the arithmetic is simple, and doing it yourself beats guessing.

The formula is: final strength in mg per ml equals the shot strength multiplied by the volume of shot added, divided by the final total volume in the bottle. Here is a worked example for illustration only. Imagine a bottle holding 70ml of liquid with room to reach 100ml. One 10ml shot at 18mg gives 80ml at 2.25mg. Two shots give 90ml at 4mg. Three shots give 100ml at 5.4mg. Do not assume those figures apply to Rainbow Surf. The label states the real fill volume and the real room available, and those numbers decide what you can make.

Some general points on choosing a strength. UK rules cap nicotine in e-liquid at 20mg per ml. Low strengths are typical for large, airy sub-ohm style devices, because you inhale a lot of vapour per puff. Higher strengths are more usual in small, tight-draw devices, where each puff delivers less. Beyond that it is personal, and people moving from smoking commonly begin by trying to match how strong their previous habit felt, then adjust over a few weeks.

If your device is a small pod system and you want a higher strength, a shortfill may not be the right tool. High strengths in a thick, high-VG liquid can be harsh, and the bottle's headroom limits how much nicotine you can add anyway. In that situation nicotine salt e-liquids are made for exactly this job and come ready mixed in 10ml bottles.

A few safety habits apply whenever you handle shots. Nicotine is addictive and is absorbed through skin, so wipe up spills promptly and wash your hands. Keep shots and mixed bottles out of reach of children and pets. Label any bottle you have mixed with its new strength and the date, and shake it well so the nicotine is evenly distributed before you fill your device.

Storing a Large Bottle So the Flavour Holds Up

Heat is the main enemy of e-liquid. A bottle left on a sunny windowsill or in a warm car will darken, thicken and lose character far faster than one kept somewhere cool. A cupboard or drawer away from radiators and direct sunlight is ideal, and a steady room temperature beats any trick.

Because a 100ml bottle lasts a long time, storage is not a minor detail. Some practical rules:

• Keep it upright and tightly closed. Air exposure dulls flavour and the cap seals out dust, so screw it down after every use.
• Keep it dark. Light degrades the liquid over time, which is why many bottles are tinted or opaque.
• Decant sensibly. If you carry spare liquid, use a small clean dropper bottle and leave the big one at home. Wipe the nozzle before you close the cap so residue does not build up in the threads.
• Do not refrigerate or freeze it. Cold makes thick liquid very slow to wick, and condensation can creep in when the bottle warms up again.

Check the label for any best-before information. A fresh bottle should still be in date when it arrives, and unopened liquid usually keeps well if stored properly. Once opened, the clock effectively starts, and many people aim to finish a bottle within a few months. If you notice the colour deepening, an odd smell, or a flat taste that a fresh coil does not fix, it is probably time to replace it.

Finally, safety. E-liquid is not food or drink and should be kept out of reach of children and pets, ideally somewhere high up. If you have added nicotine shots, treat the mixed bottle with extra care, and store unused shots separately from any food. Dispose of empty bottles and used coils according to your local recycling guidance. A little care at home keeps the flavour as intended and avoids needless accidents.

Troubleshooting Leaks, Gurgling and Weak Flavour

Most problems with a refillable setup come from a short list of causes, and nearly all are easy to fix once you know what to look for. Here are the common ones.

• Leaking from the tank or pod. Check the fill level first, as overfilling is the usual culprit. Then make sure the coil is seated fully and every threaded part is snug but not forced. Warm hands and a full tank in a hot pocket can also push liquid out.
• Gurgling or spitting. This often means too much liquid is flooding the coil, or condensation has built up in the airflow. Tilt the device and blow gently through the mouthpiece with the battery off. Pull the tank slightly lower on the fill.
• Dry or burnt hits. The coil is not getting enough liquid. Check the level, make sure the coil was primed, and consider turning the power down. If the burnt taste remains, change the coil.
• Weak or flat flavour. An old coil is the most common reason. Other causes are low power, a tank that has not been rinsed since the last flavour, or palate fatigue after vaping the same liquid all day. Try a fresh coil and a break of a few hours.
• Sticky bottle and messy threads. Wipe the nozzle after every fill. A bit of tissue now saves a sticky cap later.

Thick liquid deserves a special mention. High-VG blends wick slowly, so a coil that is perfectly healthy can still seem to starve if you chain-vape. Pausing between puffs lets the cotton refill. Matching the coil to the liquid, as discussed earlier, prevents many of these symptoms before they appear.

If you have tried the basics and the problem continues, work through the device manual and check whether the coil, not the liquid, is at fault. A genuinely faulty bottle is rare, but if you receive one that is damaged, leaking from the packaging, or clearly not as described, keep it and the packaging and contact the shop. The returns section below explains how faulty items are handled.

Delivery, Age Checks and Returns in Brief

Here is the practical side of ordering Rainbow Surf, summarised from the shop's own pages. For full detail, see the delivery and returns page.

• Free standard delivery applies to orders over £20, with arrival in two to three working days.
• Standard delivery costs £2.99 on orders under £20.
• Next-day delivery costs £4.99. Order before 4pm, Monday to Friday.
• Same-day dispatch applies to orders placed before 4pm on a working day.

Since a single bottle costs £7.99, one bottle will not clear the free delivery threshold on its own. Three bottles will, at £23.97. That is worth bearing in mind if you are ordering for the first time and are thinking about stocking up on one or two flavours from the range.

Age checks come next. This product is sold only to adults aged 18 and over. Every visitor confirms their age on entry and every order is verified electronically. Where a check is inconclusive, the shop may ask for ID before dispatch, so have a document to hand in case. The age verification page explains the process. It also states that nicotine is an addictive substance and that products are not suitable for non-smokers, under-18s, or those who are pregnant or breastfeeding. This bottle is nicotine-free as supplied, but those cautions apply as soon as you add a shot.

Returns work differently from most retail. For hygiene and safety reasons, opened e-liquids cannot be returned. Faulty items can be returned within 30 days for a replacement or refund, so if your bottle arrives damaged or defective, get in touch promptly and keep the packaging. Because you cannot send back a bottle once it is open, the sensible move with an unfamiliar flavour is to buy a single bottle first and judge it before ordering more. Orders arrive in plain, discreet packaging.