Flip and Sip - Double Wall Acrylic Sport Tumbler -20oz. Capacity These Colorful Tumblers are great for the daily use of all your hot or cold beverage needs. BPA Free Acrylic Construction of Cup Housing and Screw on Lid, with rubber gasket seal. Double wall insulation keeps your cold drink while minimizing condensation "sweat" on the outside of the cup. Flip up straw is built into the threaded lid with a protective cover. Hand wash. Not for microwave, dishwasher, cooking or freezing use.