E-cigarette /

An electronic cigarette, or e-cigarette, is an electrical device that simulates the act of tobacco smoking by producing an inhaled mist bearing the physical sensation, appearance, and often the flavor and nicotine content of inhaled tobacco smoke; though without its odor, and intended to omit its health risks. The device uses heat (or in some cases, ultrasonics) to vaporize a propylene glycol- or glycerin-based liquid solution into an aerosol mist, similar to the way a nebulizer or humidifier vaporizes solutions for inhalation. Most electronic cigarettes are portable, self-contained cylindrical devices in varying sizes, and many are designed to outwardly resemble traditional cigarettes. Most are also reusable, with replaceable and refillable parts, though some models are disposable.