Stanley mugs have become a pop culture phenomenon, especially its mega-sized Stanley Adventure Quencher, which can hold up to 40 ounces of liquid. The current recall involves smaller travel mugs whose lid threads can shrink when encountering heat and torque, potentially causing the lid to detach while consumers are using the mugs.

Stanley is recalling 2.6 million mugs sold in the U.S. after the company received dozens of consumer complaints.