Thermos 16 Ounce Stainless Steel Travel Mug, Plum Thermax double wall vacuum insulation for maximum temperature retention. keeps hot for 5 hours, keeps cold for 9 hours durable stainless steel interiors and exteriors Leak-proof lid with one hand push button operation Built in tea hook easily holds tea bags or most loose leaf infusers 16-ounce vacuum insulated tumbler; dishwasher safe