Our signature DEAN & DELUCA gunmetal travel mug is designed to be 100% leak proof. The patented auto seal lid is what makes the mug leak and spill proof yet it makes drinking easy. Press to sip, release to seal. Made from durable stainless steel, the mug has a double wall and is vacuum insulated ensuring that hot beverages stay hot and cool beverages stay cool. Hot for up to 4 hours, cold for up to 12. Hand wash using nonabrasive cleansers. The lid is dishwasher safe. Do not fill with boiling liquids. Not intended for carbonated beverages. Do not microwave or freeze. 2.5"x7.75"