Material stainless steel Capacity 600ml+450ml Material type free of charge, BPA free About this project High-quality materials: 304 stainless steel refrigerator sealed food box and environmentally friendly food-grade silicone, leak-proof seal does not contain BPA. Unique material and design, easy to clean. Main features: Use silicone strips to seal and close, and the silicone vent design can quickly squeeze out the excess vacuum pressure and keep the food fresh. Stainless steel metal containers can speed up the freezing of food and extend the storage time. Main function: Metal box with low heat capacity. Advantages: It can be quickly frozen at -18 or in the freezer compartment of the refrigerator. Metal cooling makes the food fresher. It can store different foods while heating the fresh-keeping box. Various uses: kitchen fruit and vegetable box, refrigerator fresh-keeping box, vacuum fresh-keeping box for fresh fruit and vegetable meat. Office, student lunch box, work school lunch, picnic, camping, outdoor dining.