21 is the way to go.

Electronic cigarettes now are also against the law for purchase by anyone under 21. Thank you, Tucson City Council (with the exception of the one in the pocket of Tobacco Barn)! Raise taxes on ALL tobacco products also! "Most teens are sensitive to pricing. Higher prices can dissuade would-be smokers..." www.heart.org/en/healthy-living/healthy-lifestyle/quit-smoking-tobacco/how-to-keep-kids-and-teens... The miracle cure for vaping & smoking is to immediately hike tobacco taxes on ALL tobacco products (e-cigarettes & hookah shisha are tobacco products) to 92% to price nicotine addicts out of the tobacco substance abuse market, especially teenagers on allowances and minimum wage, plus, to further prevent youth from ever starting tobacco substance abuse, to raise the tobacco purchase-use-possession age to 21, past the age when 90% of them start vaping & smoking. A 92% e-cigarette tax started on the 1st of July 2019 in Vermont. "...Vermont will become the 14th state to raise the age to buy or possess tobacco products or e-cigarettes from age 18 to 21. A separate new law effectively prohibits the online sale of e-cigarettes, liquid containing nicotine, or other tobacco substitutes to Vermonters by requiring such sellers to hold a Vermont license. The third law subjects the sale of e-cigarettes and liquid nicotine to the same 92% tax already assessed on tobacco products." --Chicago Tribune, June 2019 The main goal of tobacco tax increases on ALL tobacco products isn't to generate revenue- though that should only benefit public health agencies and smoking prevention or cessation nonprofits- it is to induce people to quit nicotine addiction and, best of all, to prevent teenagers from ever getting hooked by pricing them out of the tobacco substance abuse market. www.ncbi.nlm.nih.gov/pmc/articles/PMC3228562/https:// www.ncbi.nlm.nih.gov/pmc/articles/PMC3228562/ "Tobacco taxes can benefit smokers who quit, reduce the overall consumption of tobacco, and put smoking cessation on the radar of those who continue to smoke. Increased taxes also have a positive impact on non-smokers by reducing their exposure to second-hand smoke.