Electronic Cigarette

Electronic cigarettes, e-cigs, or e-cigarettes are electric inhalers that release water vapor, rather than smoke. The water vapor often contains nicotine, because these devices are marketed as a healthier alternative for tobacco smokers.

Construction
Electronic cigarettes are typically housed in long cylindrical aluminum casings -- to mimic the appearance of tobacco cigarettes. The battery, which occupies the majority of the aluminum housing, provides the energy required to heat fine tungsten coils. These tungsten coils provide the heat required to vaporize the liquid contained in the aluminum housing.

Popular Brands

 * AquaCig e-cigs 
 * Blu Cigs 

Other Links

 * Ecig Wikia page: http://ecig.wikia.com/wiki/E-Cig_Wiki