Nicotine shots also known as Nic Shots are designed to be mixed with 0mg Shortfill E-liquids to give them a nicotine boost. Nicotine Shots are available in various pg/vg ratios and in several different nicotine strength, with 18mg being the most common. Mixing 1 x 18mg nicotine shot will a 50ml shortfill bottle will make 60ml of 3mg E-liquid. Adding 2 x 18mg nicotine shots to a 100ml bottle will make 120ml of 3mg E-Liquid. After mixing your nic shots in to your shortfill make sure to shake the bottle vigorously for at least 2 minutes after to ensure that the nicotine has been distributed evenly in the bottle.