E-cigarette
An e-cigarette (or e-cig) is an alternative to the cigarette, providing small amounts of the chemical nicotine with each inhalation.
The device takes the form of a tiny rod which is slightly longer than a normal cigarette. The mouthpiece of the device contains a replaceable cartridge filled with liquid. In the patent pending version of the e-cigarette, the main substances contained in the liquid are nicotine, propylene glycol, and optional flavours or aromas.