The document discusses e-cigarettes, which are battery-operated devices that provide flavored nicotine vapor as a safer alternative to cigarettes. While e-cigarettes may help some people quit smoking and have certain pros like being cheaper and allowing smoking indoors, their long-term health risks are unclear and they could attract new or underage users to nicotine. The FDA does not approve e-cigarettes as safe smoking cessation devices and may ban their sale until more research is done.