Introducing Sipp by Thermos. The Sipp Thermos line of products combines sleek style with unique functional features. The Thermal double wall vacuum stainless steel mug will keep hot for 5 hours and cold for 9 hours. The Eastman Triton lids are BPA free and have a built- in tea hook for tea bags or most loose leaf infusers. Leak-proof lid with one hand push button operation; dishwasher safe; 16-Ounce capacity.