These rugged Travel Mugs are 18/8 stainless steel, double wall insulated, with a powder coat finish. They feature a secure, screw-on lid that helps them hold ice for 24 hours that also works great for hot beverages. They also include the all-new shaded, splash-proof lid that lets you see how much of your tasty beverage you have left! The bottom is designed to fit in most vehicle’s cup holders thanks to the high mounted handle.