Executive Summary
Due to UK TPD regulations, nicotine-containing liquids cannot be sold in bottles larger than 10ml. Shortfills bypass this by selling 50ml of zero-nicotine liquid, requiring you to add a separate 10ml "Nic Shot".
Build Quality & Design
A standard Nic Shot is a flavorless 10ml bottle containing 18mg or 20mg of nicotine suspended in VG/PG.
Flavor & Performance Tests
Nic Shots are entirely flavorless and do not dilute the taste of your premium Shortfill; they simply add the required chemical hit.
Battery Density
Ensure you shake the bottle vigorously for 60 seconds after adding the shot to ensure uniform distribution, avoiding "hot spots" of pure nicotine.
The Final Verdict
It sounds complicated, but it takes 10 seconds. Squeeze the shot into the big bottle, shake, and vape. Welcome to the world of Sub-Ohm.