Stanley is recalling 2.6 million mugs sold in the U.S. after the company received dozens of consumer complaints, including some users who reported getting burned and requiring medical attention.

Stanley is recalling 2.6 million Switchback and Trigger Action travel mugs in response to a potential safety issue with their lids, the company said.

Stanley has received 91 reports of lids detaching worldwide, including 16 incidents in the U.S., resulting in 38 burn injuries globally and two in the U.S. Eleven consumers required medical attention.