AAMU Bulldogs: Alabama A&M University The Hill Tumbler 20oz This stainless travel-size tumbler is vacuum-insulated and built to last. It's perfect for showing off your style on the road, at the office, or in the countryside. .: Materials: stainless steel (body), plastic and rubber (lid) .: One size: 20oz (0.59 l) .: Rounded corners .: Vacuum insulated steel body with a clear push on lid with a rubber gasket (no lid cap) .: Glossy finish