Facing pressure from regulators over an epidemic of youth vaping, e-cigarette giant Juul announced in late 2018 that it would stop selling certain flavors in U.S. stores, including "fruit" and "mango.

teens, like all adults, figure out ways quickly that work around a rule that they don't like. When Jewell pulled out there mango cream, ballet and fruit that people notice, Oh, there's disposable pens ...