An electronic cigarette (or e-cigarette, e-cig) is a cigarette substitute. It gives small amounts of the chemical nicotine without the tobacco or other chemicals from real cigarettes. The main substances making up in the liquid in the e-cigarettes are nicotine, propylene glycol, glycerin and some flavors or smells. Most Vape pens can be customized to the users liking. Vapes are depicted as a "safer cigarette".