Volcano Cigs The vapor that is inhaled by the user is primarily purified water, nicotine, propylene glycol and flavor. The nicotine level and flavor differs based on the users choice. Unlike traditional tobacco cigarettes which have over 4000 chemical additives, e-Cigarettes only include the additive Propylene glycol, a humectant which is typically found in food coloring and cake mixes. It is considered to be safe for consumption by the Food and Drug Administration (FDA).