This Stainless Steel Vacuum insulated mug holds 400 ml of liquid - with a stylish matte finish is sleek and functional. Simply slide the sipper spout on the lid to open and close. It is fully leak-proof, you can enjoy clean drinking day in and day out with no spills. Even better, there is a strong grip pad design at base that keeps the mug from tipping over. The interior is stainless steel and the lid is made from BPA, BPS and phthalates free plastic. Double wall insulation provides up to 5 hours hot and up to 7 hours cold. The result is an insulation layer that performs better than any other. A superior insulated container you can depend on to keep your beverages hotter, colder, fresher, longer.