What are e-cigarettes / vapes? Whatever you know them as, an e-cigarette, e-cig or vape, they are devices that allow you to inhale nicotine in a vapour rather than in the tobacco smoke you would inhale from cigarettes. Using an e-cigarette is known as vaping. How does vaping work? E-cigarettes heat a solution, called e-liquid, which typically contains nicotine, propylene glycol and/or vegetable glycerine, and flavourings. They do not contain tobacco or produce tar or carbon monoxide – 2 of...