Thermos™ double wall vacuum insulation for maximum temperature retention, hot or cold. Durable stainless steel interior and exterior. Cool to the touch with hot liquids, sweat-proof with cold. Built-in tea hook, easily holds tea bags or most loose leaf infusers. Fits most automobile cup holders. Capacity: 16 oz. Dimensions: 3.3" W x 3.3" D x 7.6'' H.