Vaping refers to the act of inhaling and exhaling aerosol, often called vapor, produced by an electronic cigarette or similar device. These devices heat a liquid that usually contains nicotine, flavorings, and E cigarettes: Facts, stats and regulations Electronic cigarette and E liquids selections Le Petit Vapoteur Teens who vape higher doses of nicotine are more likely to become regular smokers USC Today RACGP Many e cigarette vaping liquids contain toxic chemicals: Study