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 Is Better Than Smoking, And Could Save Tobacco Users' Lives, Study Finds Newsweek Vaping vs Smoking: The Science Clearing the Air Is Vaping Better Than Smoking? Health & Environmental Impact