Thermos vacuum insulation technology for maximum temperature retention, hot and cold. Lid made with BPA free Eastman Tritan copolyester to resist stains and provide durability. One hand push button operation lid. Built-in tea hook, easily holds tea bags or most loose leaf infusers. Durable stainless steel interior and exterior. Compatible with most single cup coffee makers. Dishwasher durable, top rack recommended. Keeps hot for 9 hours. Keeps cold for 20 hours. 16 oz