88Vape 50ml Shortfill Vape Liquid Refill Bottles. If you're happy with a 0mg eliquid, then all you need to do is vape it as you normally would. If you'd like to turn this from a nicotine free eliquid in to a nicotine containing one, you simple pop the top off and squeeze in the nicotine shot, Then replace the top and the lid, and then give it a good old shake for a few minutes.