Shortfills are 0mg e-liquids, designed to either be vaped without nicotine, or at 3 or 6mg. All of our shortfills are supplied with enough freebase nicotine shots to make them up to 3mg. You simply need to add the nicotine shot, pop the lid back on and give the bottle a good shake.
If you want to use nicotine salt shots, you will have to purchase these separately.
If you want to vape 6mg, you will need to purchase additional nicotine shots.