All shortfill zero nicotine e-liquids
50ml and 100ml of flavoured e-liquids with zero nicotine in short fill bottles. Nicotine shots are available to add as optional extra. Or just use without nico shots if you don't want or need nicotine.
One 10ml nicotine shot (typically 15mg to 20mg nicotine strength) when added to (diluted into) a 50ml short fill bottle of zero-nicotine e-liquid will produce 60ml of e-liquid at a nicotine strength of approx 3mg. A 50ml short fill bottle will have space for the 60ml, hence why they are called short fills. A 100ml short fill bottle will need two 10ml nico shots to make approx 3mg nicotine strength.