Ou Premium Design- Unbreakable Frosted Tritan Cup Tumblers, Set of 4- 15 oz Set of 4 Unbreakable Frosted Cup Tumblers- 15 oz each Made of unbreakable BPA-free Tritan material- Made in USA BPA-Free Tritan (TM) is engineered to be better. Better than glass. Better than stainless. Better than any other plastic. And Tritan doesnt contain BPA, BPS or any other bisphenols. Products made with Tritan plastic are clear, durable, safe and stylish. Microwave, freezer and dishwasher safe Whether you drop it, throw it in the bottom of your backpack or wash it hundreds of times, a product made with Tritan? lasts. Tritan from Eastman is a durable copolyester that has much greater shatter resistance than other plastics and glass. It wont warp or crack in the dishwasher. And, unlike stainless steel, Tritan wont dent or ding.