Electronic cigarettes and vaporizers are devices that allow users to inhale vapor that contains nicotine. These devices, which the FDA categorizes as electronic nicotine delivery systems (ENDS), may be shaped to mimic the appearance of tobacco cigarettes, or they may have larger pipe- or cartridge-like forms. Devices that are shaped like cigarettes are known as electronic cigarettes, e-cigarettes, or informally, “e-cigs.” Larger devices are generally called vaporizers or “vapes.” ENDS function by using a battery to deliver heat via an electronic coil to a liquid mixture that often contains nicotine. The heat vaporizes the liquid, allowing the user to inhale it. (Opposing Viewpoints)