"The Texas Tech tumbler features high-grade polycarbonate strength, double wall insulation, air space and precision engineering. Great for keeping ice tea cool!

*High - Grade Polycarbonate - makes the Tervis tumbler the strongest, most durable drinkware available today.
*Double Wall Insulation - Keeps hot drinks hot and cold drinks cold.
*Air Space- Tervis Tumblers take advantage of the insulating properties of air to keep your drinks at just the right temperature.
*Precision Engineering - Since 1946, Tervis has been constantly refining their product. That's over 50 years of quality! "