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Product information:. Product name: thermos cup. Material: inner tank 304 stainless steel, PP, silicone. Capacity: 400mL, 500mL. Net weight: 300g, 350g. Insulation and cold are always accompanied by all seasons. Time passes, cold and warm remain unchanged, locking in health. Drinking water with straw cup lid. Safe material, no need to look up to drink water, elegantly replenish water. Packing list:. Insulation cup x1