What is eliquid? Eliquid or ejuice is the liquid you use in vape devices its made up of 4 ingredients Vegetable glycerin (VG) which is a clear odorless liquid produced from plants that is commonly found in foods which acts as the main base of eliquid . Propylene glycol (PG) Which is a food grade non toxic colourless odorless liquid chemical with a slight sweet taste that's used in eliquid as the flavor carrier. Flavor concentrates which are a mixture of water and food grade flavoring. Lastly freebase nicotine which is nicotine in is purest form and optional in eliquid and comes in a variety of strengths.