How the nicotine shot works? Really easy! Just 3 simple steps: Step 1: You need 60ml bottle with 50 ml liquid of extra concentrated + 10ml bottle with 18mg/ml of no flavour (nicotine shot) Step 2: Pour all 10ml bottle into your 60ml bottle with extra concentrated flavor Step 3: Shake it! ..alot and leave in dark cabinet for a few days to get more rich flavor That's it! Simple right? Now you have 3mg of nicotine.