Featuring BPA-free 304 (18/8) food-grade stainless steel construction this tumbler is keeping your beverages at just the right temperature. The double-wall insulation and vacuum seal ensure optimum temperature retention. As an added bonus it comes complete with a leak-proof lid making it ideal for on-the-go use. A stainless-steel straw and straw brush are also included for your convenience. Its more than just a tumbler its a stylish and sustainable way to enjoy your favorite drinks on the move.