This 20OZ/31OZ-Stainless Steel Vacuum Insulated Tumbler-With straw vacuum lock temperature, 6h insulation and cold, vacuum layer link inside and outside the heat transfer, 600ml/890ml two specifications to meet the office, fitness, driving water needs, threaded lid, food-grade PP, cup mouth round and smooth, straw design for easy drinking.Keeps your dinnertime drink cool well past sundown or your coffee nice and hot throughout the morning