Genuine Mercedes Benz Thermos Sipp Tumbler Brand New Genuine Mercedes Benz Thermos Sipp Tumbler - 16 oz. TherMax double wall vacuum insulation for maximum temperature retention - Keeps drinks hot for 5 hrs./cold for 9 hrs. BPA-free, unbreakable stainless steel interior and exterior. Leak-proof lid with one hand push button operation. Built-in tea hook, easily holds tea bags or most loose leaf infusers.