As you may or may not know, e-cigarettes are tobacco free devices creating no tar or mess while using them. E-cigarettes are basically electronic nicotine delivering systems. The e-cigarette device uses flavored nicotine liquid to deliver nicotine and calm cravings. Simply inhale on the e-cigarette device, like a traditional cigarette and exhale the vapor. Since e-cigarettes do contain nicotine, an addictive substance, only adults who are age eighteen or older should use or purchase them. E-cigarettes are useful in cutting the rising costs of traditional smoking. If quitting has always been a thought, e-cigarettes do offer graduated levels of nicotine all the way down to zero nicotine.