Naturally, using more e liquids or refills means buying more over the course of the year, but your margin for savings here is so large that you could double the amount of e liquid you get through and still cost effective in the long term as both a 10 a day and 20 a day smoker
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It comes with both US and EU plug options, making it compatible with a wide range of power outlets
, cited in American Journal of Respiratory and Critical Care Medicine