This 12 Oz. Commuter Travel Tumbler is constructed from 18/8 stainless steel outer and inner walls. It's copper lined so sweating is not an issue and the double-wall vacuum insulated keeps your drinks hot or cold for hours (can keep cold more than 18 hours and keep hot more than 8 hours). This insulated travel tumbler has a spill-resistant slide ABS plastic lid w/ rubber gasket, is BPA-Free, FDA compliant and ships assembled. Hand wash recommended. 6 5/8" H x 3 1/2" W