San Francisco became the first city in the country to ban the flavored liquids used in e-cigarettes, unwilling to wait for the Food and Drug Administration to take federal action. And New York state is not far behind.

San Francisco voters approved a ban on liquids that come in flavors such as cotton candy and cookies and cream, while New York’s state legislature is considering a similar ban. Activists and lawmakers say flavored e-liquids can entice minors to take up e-cigarettes.