8 in 10 Support raising the minimum age to purchase tobacco products, e cigarettes, and vaping devices to 21 Tobacco 21 The law requires customers to be 21 to buy alcohol, but there is no legal age requirement currently in SC to purchase certain edibles or drinks that contain THC, the chemical in How Old Do You Have to Be to Vape? Vaping360 Legal Age to Vape What's the deal? Juicemate You'll have to be 21 to buy cigarettes or vape products in Washington starting Jan. 1, 2020 KNKX Public Radio In South Carolina, it's illegal for anyone younger than 21 to buy vaping products. Now, Aiken County leaders have approved new zoning restrictions.