No more spilling hot coffee during the morning commute. Dayventure Tumblers fit 99% of all car cup holders. The leak-proof locking insulated lid made with Tritan? copolyester keeps liquids safely inside, while the 18/8 pro grade stainless steel is vacuum-sealed and double-walled to withstand the regular bumps and drops of everyday life. The sweat-proof powder finish, ergonomic design, and built-in loop for easy backpack attachment means this tumbler looks good and feels good to the touch.