simple cheap refill green smoke e-cigarette cartridge. no nicotine no flavour

as described in the title . I use vegetable glycerin USP (correct me if I’m wrong but USP means food grade?). Get this stuff for a few bucks at most good pharmacies. No need for flavour, glycerin is already sweet. Save yourself the trouble and skip the nicotine too (get gum or something! ) Credit to www.youtube.com for showing me how to do this and helping me decide on greensmoke.
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