Since 1946, Tervis has made the best insulated tumblers on the market. Two engineers – Frank Cotter and G. Howlett Davis – developed the technology that fuses an inner liner inside an outer shell. They combined the last three letters of each of their names and named their company Tervis. Today, their insulated tumblers are still made in the USA – and still keeping hot things hot and cold things cold. This official Airstream Tervis Tumbler features an Airstream logo fixed in the space between the inner liner and the outer shell.