You'll have to be 21 to buy cigarettes or vape products in Washington starting Jan. 1, 2020 KNKX Public Radio Washington advocates push for state ban on flavored vapes Tri Cities Area Journal of Business Where to Buy THC Vapes near Seattle WA Simple Garden Vapes and nicotine pouches in Washington became significantly more expensive yesterday when the state's 95% tax on these nicotine products went into effect.