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, Electronic cigarette Wikipedia E Cigarette vs. Traditional Cigarette: Health Risks, Research Gaps, and Counseling Considerations Kids Health Info : Vaping and e cigarettes