After purchase, I only washed it and put hot water in it to check the heat retention. - Color: Gray Beige - Capacity: 430ml - Material: Stainless Steel - Washing Method: Easy-to-wash internal design - Heat Resistance: Lid 100°C, Packing 150°C, Cold Resistance: Lid -20°C, Packing -30°C Although unused, it has been washed once and stored after purchase. Please refrain from purchasing if you are concerned about minor details.