Contigo At a Glance 16-ounce stainless steel travel mug for both hot and cold beverages New and improved pull-tab lid makes this mug 100-percent leak-proof Vacuum-insulated stainless steel keeps beverages hot for 4 hours and cold for 12 hours Carabineer clip on the handle allows you to take this mug wherever you go; attach it to a bag strap for hands-free portability Sleek, modern grip texture make this mug easy to carry and hold Fits most standard car cupholders Contigo's Extreme travel mug is the ultimate on-the-go coffee companion. This mug's design is perfect for a road warrior's Monday morning commute or an outdoor enthusiast's latest adventure. The stylishly rugged features aren't just for good looks, though - they combine into a product that really can go anywhere at any time. The Extreme travel mug features double-wall stainless steel vacuum insulation, ensuring that your hot coffee or other beverages stay that way. Leak-proof design The Extreme mug features a newly-designed pull-tab that delivers 100-percent leak-proof protection along with increased durability. The tab's simple design allows for easy opening and closing of the drink hole.