If you still havent made a purchase, consider looking into the differenty types of e-cigs available so you can find one that suits your needs
Tobacco industry development of low nicotine cigarettes"
Smoking facts - Smoking is the single largest preventable cause of disease, disability, and premature deaths in the world today
Gallant et al., Phenylpropanolamine Increases Plasma Caffeine Levels, Clinical Pharmacology and Therapeutics, June 1990;47(6):67585
#19 Also, it should be noted that even shipment of the restricted items (cigarettes, smokeless tobacco and ENDS products) can be gifted and mailed with USPS
He also went on to say that some studies indicate that pipe smokers often times out live non-smokers