Vaping is the act of inhaling an aerosol (often mistakenly called vapor) produced by a battery operated device called an e cigarette or vape. These devices heat a liquid that usually contains nicotine, flavorings, Vape aerosol isn't water. It contains nicotine, formaldehyde, ultrafine particles, and flavor chemicals linked to lung irritation. Know what you're inhaling. E Cigarettes and Vaping PPAC Central How to Refill a Vuse Pod: A Simple Step by Step Guide