Features 1、 Features: 2、Premium Material: The 20oz/30oz tumbler has triple-insulated, stainless steel vacuum technology, including an inner layer of copper which prevents heat transfer to the outer walls. This gives you additional hours of insulation, it'll keep hot drinks hot and cold drinks cold. 3、-proof Straw: The stainless steel tumbler comes with an innovated folding straw lid that allows for easy one-handed drinking while on the go. The straw lid is leakproof when closed for easy transportation. 4、Insulated Tumbler: Stainless Steel Tumbler is a, double-wall insulated cup designed to keep beverages ice cold. The powder coat finish ensures an easy grip and the tumbler won't sweat so you can put it down on a desk or countertop without a coaster! 5、Convenient to Clean: You'd better use the hand wash method with a straw brush; of course our coffee tumble travel mug will not have any problems in the dishwasher. 6、BPA Frree Hydration: From insulated stainless steel water bottles, to beverage makers and pitchers, our products are BPA to help you stay cool, refreshed, and hydrated. Specifications Specification: Material: Stainless steel Color: White, Black, Green, Blue,, Package Size: 19 × 9 × 9 cm, 23 × 9 × 9 cm Weight: 280 g, 230 g Capacity: 20oz/600 ml, 30oz/890 ml Package List Package Include: 1 x Cup 1 x Straw