Young adult cancer survivors more likely than peers to use e cigarettes Irish Cancer Society position on e cigarettes Irish Cancer 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, Most E cigarette Users Ages 18 to 29 Never Smoked Before American Cancer Society