From the Thermos™ vacuum insulation technology, to the Dura-seal™ 360˚ drink lid that is leak proof when closed, to the Griptec™ non-slip base and handle, this mug is truly iconic. The Icon™ Series by Thermos is a celebration of what’s made us thrive for over a century: Meticulous design, thoughtful engineering, and a relentless desire to make people’s days easier.