Get all the same temperature-control technology in a smaller size with the 12 oz. tumbler. The smallest Bison tumbler offers unbeatable drop, spill, and leak protection when you’re on the go — in rush hour or in the wild. It’s resistant to scuffs and dings thanks to its thick, stainless steel construction. Plus, you won’t have to clean up spills or leaks due to the screw-on Tritan® lid that locks liquids in. Fill up the 12 oz. tumbler with whatever drink you choose and enjoy; our tumbler will keep your liquids hot for 6 hours or cold for up to 12 hours.