TopFriday Vacuum Insulation Mug One-touch Open Type, 12-Ounce, Green Body is made of Aerospace material - Titanium Alloy Steel, Lid is made of food grade polypropylene Improved detachable leak-proof lid, east to clean and keeps drinks hotter or cooler longer 8-layer painting, satin finish Keep hot water at temperature above 60C for 6 hours and cold for 24 hours