The Electronic cigarettes have come a long way from the original Ruyan design (2003)- and indeed from the 1965 smokeless Cigarette patented by Herbert A. Gilbert ( see:freepatentsonline.com) in 1965. However, the basic concept is still the same. Nicotine is dissolved in a solution consisting of water and Propylene Glycol. Propylene glycol is a solution which is used in many other food