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, What is the e Cigarette and how does it work? How Electronic Cigarettes Work HowStuffWorks What is E Cigarette The Vapor Bar Vaping What's the Difference Between E Cigarettes and Vapes? Grow Strong KC E cigarettes would be excluded from some regulations under new proposal