Vape Inhalation: To Puff or Not to Puff? Find Out! 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, Mouth to Lung (MTL) Vs Direct Lung (DL) Inhale Explained E Cigarette Direct Secondhand vape exposure: Risks and side effects How to Inhale When Vaping Aqauvape Vaping Guides Aquavape What Does Vaping Do to Your Lungs? Johns Hopkins Medicine