Shake and Vape bottles come with zero nicotine liquid in an oversized bottle (size dependant on brand) and specific nicotine shots for that brand (included in price). All you have to do, is pour the nicotine shots into the bottle, give it a shake and you now have a bigger bottle of liquid.

Remember, this is shake and vape so shake it well after you have mixed the nicotine in and leave to stand for 30 minutes.