Product name: portable thermos cup. Product material: 304 stainless steel. Product weight: 0.8KG Thermal insulation performance: thermal insulation and cold preservation for 6 hours to 12 hours. Product capacity: 500ML/size: 23.9cm*6.6cm product details: 304 stainless steel selected healthy material: 304 stainless steel inner tank is delicate and smooth, no dirt accumulation, good corrosion resistance, acid and alkali resistance, healthy and safe contact, long-term heat preservation, healthy and odorless, material safety SUS 304 A cup of three lids, portable drinking water. Micro arc grip, comfortable and easy to carry.