E-Juice, also known as e-liquid or vape juice, is the fluid used in vaporizers and electronic cigarettes that creates the actual vapor. It normally contains nicotine but is also available without nicotine depending on personal preference. Nicotine found most commonly in e-liquids is called freebase nicotine and can be thought of as pure nicotine. E-liquids containing freebase nicotine will produce a stronger throat hit. Because of this, they are offered in lower nicotine strengths (3mg, 6mg, 12mg). There are three main components of e-liquid relating to vapor production; propylene glycol (PG), vegetable glycerin (VG), and flavoring. E-juice that contains higher propylene glycol, or PG, ratio is typically much thinner, has a stronger throat hit, and more flavor. Juices containing higher vegetable glycerin, or VG, ratios will have thicker clouds and a little less flavor.