Shares of Philip Morris extended their recent bounce Thursday after the U.S. Food and Drug Administration authorized the marketing of 20 of the tobacco company’s Zyn nicotine pouches.

Federal health officials on Thursday backed the public health benefits of nicotine pouches, authorizing Philip Morris International’s Zyn to help adult smokers cut back or quit cigarettes.

Tobacco stocks gained slightly on Thursday after the FDA has authorized the marketing of 20 Zyn nicotine pouch products through the premarket tobacco product application pathway. The development marks the first time the agency has approved nicotine pouches,