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, Which is bad for tobacco and electronic cigarette scientifically? GIGAZINE Vaping vs. smoking: what are the risks? Pacific Life Re Vape Nicotine Levels: What Is Best for You? Electric Tobacconist