Short fill e liquids are vape eliquids that come in large bottles usually 50ml minimum that have the space inside (usually filled to 80% of their capacity) them to add further e liquid known as a nicotine booster or nic shot. Shortfill e liquids are nicotine free (Due to TPD law only allowing 10ml size bottles if they contain nicotine contents) flavoured juices and with the addition of 1 x 10ml nicotine shot (18mg or 1.8% nicotine) or nicotine booster, boosts 50ml of zero nicotine e liquid into a 3mg/0.3% nicotine e juice. After adding the nicotine booster to the Shortfill bottle, simply shake the contents vigorously for 60 seconds. The result is a High VG eliquid in 3mg nicotine strength in 60ml quantity. available in varying PG / VG ratios to suit varying e liquid composition.