An electronic cigarette, also known as a personal vaporizer, is a battery-powered device that provides inhaled doses of nicotine by way of a vaporized solution. It is an alternative to smoked tobacco products, such as cigarettes, cigars, or pipes. In addition to nicotine delivery, this vapor also provides a flavor and physical sensation similar to that of inhaled tobacco smoke, while no tobacco, smoke, or combustion is actually involved in its operation.

An electronic cigarette usually takes the form of some manner of elongated tube, though many are designed to resemble the outward appearance of real smoking products, like cigarettes, cigars, and pipes. A common design is also the "pen-style", so named for its visual resemblance to a ballpoint pen. Most electronic cigarettes are reusable devices with replaceable and refillable parts.

Electronic cigarettes have no fire, no tar, no carbon monoxide, no ash, no stub.  They also let you enjoy and satisfy those tactile taste sensations without any risk on smoking and on tobacco.  Electronic cigarettes are can be smoked anywhere without environmental pollution.