Read "Public Health Consequences of E Cigarettes" at NAP.edu What is an E Cigarette or Electronic Cigarette? Electronic cigarettes (e cigarettes) are sometimes called e cigs, vapes, vape pens, and electronic nicotine delivery systems (ENDS). E cigarettes come in many shapes and sizes. Most e cigarettes contain nicotine. Get the facts about e cigarettes, Vaping Public Health Idaho North Central District What You Should Know about E Cigarettes & Vaping American Lung Association