A longfill is a 60ml bottle filled with around 20ml of concentrated flavour. The remaining space is left empty so you can add nic shots and a VG/PG base to hit your preferred nicotine strength and consistency. You shake it, let it settle if needed, and vape it.

A shortfill is a larger bottle of pre-mixed, nicotine-free e-liquid with a small gap at the top for one nic shot. A longfill contains a smaller amount of concentrated flavour with more empty space, giving you more flexibility over nicotine strength and base ratio. See our full guide to the differences for a detailed comparison.

Technically yes, but it is not recommended. The concentrate is designed to be diluted. Vaping it neat will give you an overpowering flavour, potential irritation, and a very thick liquid that may not wick correctly. Always add nic shots or a base before vaping.

For a standard 60ml longfill with 20ml concentrate, adding two 10ml nic shots typically gets you to around 3mg, or four shots to around 6mg. The exact result depends on the concentrate volume, the final bottle size and the strength of the nic shots you use, so always check the specific product instructions, as these can vary between brands.

It depends on the concentrate and base you use, but most mixed longfills end up around 70VG/30PG or higher. This makes them smooth and vapour-heavy, which suits sub-ohm and DTL setups. Read more about what VG and PG actually are if you want the full breakdown.

Sub-ohm tanks and DTL mesh coil setups are the best match for high-VG longfill mixes. Tight MTL pod kits struggle with thick VG and will produce poor flavour or dry hits. Check out our guide to sub-ohm vaping for device recommendations.

Fruit longfills are usually good to vape immediately after mixing. Dessert, cream and custard profiles often benefit from steeping for one to three days, which allows the flavour to fully develop. Our how to steep e-liquid guide covers when steeping is worth doing and how to speed it up.

Yes, in most cases. The cost per ml of a mixed longfill is lower than a comparable pre-mixed shortfill or nic salt, and the format is not subject to the same UK vape tax as nicotine-containing e-liquids sold ready to vape. That difference becomes more significant when the UK vape tax comes into full effect.

The UK legal limit for nicotine in e-liquid is 20mg/ml. Standard nic shots sold here are 18mg/ml or 20mg/ml, and after dilution in a longfill mix, the resulting strength falls well within legal limits at typical use levels of 3mg to 12mg.

Most are not, because the resulting mix is too thick for tight MTL coils. If you prefer MTL vaping and want flexibility over nicotine strength, a 50/50 nic salt shortfill is a better option. See our nic salts vs freebase guide for more on that.

Our range covers fruit, menthol, tropical, dessert and candy profiles. Brands include Nixer, Doozy Vape Co, Rachael Rabbit and Unreal, plus exclusive collaboration releases. Whether you want something sharp and icy or rich and sweet, there is a longfill in the range worth trying.

No. Longfills are sold without nicotine. You add your own nic shots separately to achieve your preferred strength. This is part of what keeps them cost-effective and outside the direct scope of certain UK vape tax categories.