An electronic 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 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.

The modern electronic cigarette was invented by a Chinese pharmacist Hon Lik in 2003 and introduced to the market the following year. The company he worked for, Golden Dragon Holdings, changed its name to Ruyan, and started exporting its products in 2005 - 2006, before receiving the first international patent in 2007.

Ecigarettes all share three essential components:

*A Cartridge that serves as a mouthpiece and usually doubles as a small reservoir holding the liquid that is to be vaporized.
*An Atomizer that serves as the heating element responsible for vaporizing the liquid.
*A power supply, which in portable models is a battery. Other electronic components necessary for operation are housed within the power unit.
*A Cartomizer option is available for most models that replaces the separate cartridge and atomizer components with a single integrated piece. This option is disposable, as opposed to standalone atomizers which are reusable and comparatively expensive.

Electronic Cigarettes not only make you healthier but also save you money! Ecigarettes are really becoming the best alternative to smoking.