Designed for use with Short Fill E Liquids, this nicotine booster shot by NicNic in a 70 VG blend will boost your nicotine free e liquid into a nicotine containing liquid. This a 10ml sized bottle containing 18mg/ml nicotine, and is flavourless. When added to a 50ml nicotine free shortfill bottle, this will mix to a total of 3mg (2.7mg/ml). For larger shortfill bottles e.g. 100ml (80ml of e-liquid), add two nic shots to mix to a 3mg strength.