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, E cigarettes are not a healthier alternative to cigarettes. They contain nicotine and many harmful ingredients that can cause cancer and heart disease. Since these products are relatively new, we don't know all Read "Public Health Consequences of E Cigarettes" at NAP.edu What Are Cig A Likes? A Comprehensive Guide to Cig A Like Vape Devices SMOKO E Cigarettes Electronic cigarette Wikipedia E cigarette Characteristics, Safety Issues, & Regulation Britannica