Stanley has received 91 reports worldwide, including 16 in the U.S., of the recalled travel mugs’ lids detaching during use, resulting in 38 burn injuries worldwide, including two burn injuries in the U.S., with 11 consumers worldwide requiring medical attention.

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.