It takes all of these devices to keep me off tobacco cigarettes. All these devices do deliver nicotine at 6 mg per ml the more amazing thing is 147,140 chemicals per pack of cigarettes not going into my body.  2,942,800 chemicals over 400 cigarettes. The average nicotine vape has under 5% and the cancer risks of a .5% of the chemicals which most can't be distinguished from the air we currently breathe in (outdoor air) having more cancer risks. I would need to vape 8018 mls of e-juice 70 months or almost 6 years of vaping to = 20 packs of tobacco cigarettes of chemicals. This is the very definition of harm reduction.#vapecommunity