Difference between heated tobacco products and e cigarettes PMI Philip Morris International Vaping vs. smoking: what are the risks? Pacific Life Re Are E Cigarettes the Right Choice? SiOWfa15: Science in Our World: Certainty and Controversy 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,