A longfill bottle can look almost empty when opened. This is because the bottle is not intended to be ready-mixed from the start. It usually contains concentrated flavouring, while the rest of the bottle’s space is intended for base liquid and any additives.
This means that the amount of liquid in the bottle does not always correspond to the bottle’s total volume. A larger bottle can therefore contain a smaller amount of flavour concentrate.
What is a longfill?
Longfill is a type of e-liquid in which the bottle contains flavour concentrate in a larger bottle. The product is not ready to use directly in an e-cigarette, but is intended to be diluted according to the product’s instructions.
The empty space in the bottle is there so that the mixture can be completed in the same container. It is part of the product’s design and does not automatically mean that the bottle has been incorrectly filled.
Why isn’t the bottle filled all the way?
Longfill bottles are not filled all the way because the contents consist of concentrated flavouring. The flavour concentrate makes up only part of the finished mixture. The rest of the bottle’s volume is intended for the liquids that are to be added to achieve the finished quantity.
It is therefore common for a longfill bottle to appear to contain little liquid compared with the size of the bottle. The amount is adjusted according to how the product is to be mixed, not according to how full the bottle appears upon delivery.
Is there something wrong with the product if the bottle looks empty?
No, not if the amount corresponds to the product information. A longfill bottle is designed to have empty space remaining in the bottle. The empty space is used to add base liquid and any other components without having to use a separate mixing bottle.
The important thing is to check the stated amount of flavouring or concentrate on the product’s label or product page. The bottle’s total size and the amount of liquid in the bottle are two different things.
Why are larger bottles used?
Larger bottles are used to make room for the finished mixture. If the flavour concentrate were supplied in a small bottle, the contents would need to be mixed in a separate container. With a larger bottle, there is room to complete the mixture directly in the original bottle.
This also means that the bottle’s volume can correspond to the amount of e-liquid the product is intended to become after mixing, even if it does not contain the full amount from the beginning.
How does longfill differ from shortfill?
Longfill and shortfill are based on similar principles, but they are not the same thing. A shortfill usually contains more ready-mixed liquid and leaves room for additions, while a longfill often contains a smaller amount of concentrated flavouring that needs to be diluted more.
For those who want to understand the difference between bottle types, it may also be relevant to read more about what shortfill is.
What should you check?
- Bottle volume: The total size of the bottle.
- Amount of contents: How much flavouring or concentrate the bottle contains upon delivery.
- Mixing instructions: How the product is intended to be completed.
- Nicotine content: If nicotine is to be added, this must be done according to the product’s instructions and applicable regulations.
Things to remember
It is normal for a longfill bottle to contain less liquid than the bottle’s total volume. This is because the bottle contains concentrated flavouring and has space remaining so that the mixture can be completed.
A longfill bottle that looks almost empty is therefore not necessarily faulty. Always check the product information to see how much concentrate the bottle contains and how the product is intended to be mixed.
