Federal flavor ban goes into effect Thursday, but many flavored vape products will still be available Parents: Teens Are Still Vaping, Despite Flavor Ban. Here's What They're Using New Hampshire Public Radio 2FIRSTS Vapesourcing, a leading U.S. vape retailer, has announced it will no longer supply flavored nicotine products to California and Massachusetts. Flavored Vape Bans Led to Increase in Teen Smoking: Study Newsweek Are Flavored Vapes Banned in Your U.S. State? Check the Latest List