Since the implementation of the new EU Tobacco Products Directive (TPD), nicotine-containing liquids can only be sold in bottles no larger than 10ml. Therefore, some consumers are turning to larger bottles of non-nicotine containing liquids and adding boosters.

Boosters come in 10ml bottles containing a neutral nicotine base of 20mg/ml. A 10ml booster bottle containing 20mg/ml contains a total of 200mg of nicotine (20mg x 10ml = 200mg).

Nicotine boosters are very popular with DIY enthusiasts, but also with those who prefer 50ml and larger bottles. These liquids are usually labelled 'Shortfill' and come in bottles that allow you to add one or two nicotine boosters. The flavours are slightly overdosed to ensure optimal results once the liquid is diluted. Users who prefer to vape without nicotine are recommended to dilute with neutral base for a satisfying experience.