OneDay Mini Capsule 7.4 Ounce Stainless Steel Vacuum Insulated Thermos Hydration Bottle Travel Tumbler, Blue Constructed with unbreakable stainless steel exterior and interior Vaccum insulated double wall keeps your drink hot for up to 4 hours and cold for 12 hours Rubber gasket prevents spills and leaks Brightly colored, lightweight and easily portable Volume: 7.4 ounces, not dishwasher safe, not microwave safe