Shortfill E-Liquids

Short fill liquids are exactly what they say, 0mg strength e-liquid in a bigger size bottle, leaving enough space to add a nicotine shot.
A 50ml shortfill is 50ml bottle of e-liquid in a 60ml bottle , leaving enough space for 1 x 10ml bottle of 18mg nicotine shot, which when mixed makes 60ml of 3mg e-liquid.

A 100ml shortfill is 100ml of liquid in a 120ml bottle, leaving enough space for 2 x 10ml bottles of 18mg nicotine shots, which when mixed makes 120ml of 3mg e-liquid.