 The FDA did not give its approval or its endorsement, but it did allow the best-selling e-cigarette in the U.S. to remain on the market. View's Alto sales can continue, but only the tobacco-flavored version. Manufacturer Reynolds American is challenging the FDA's rejection of its menthol product. View's accounted for 40% of all U.S. vaping sales last year, most for menthol products, which are still available pending that court's decision. Brian Clark, ABC News.