STEEL VACUUM FLASK 800ML Product Specifications: Product Name : Vacuum Insulated Flask Capacity : 800 ml Inner Material : 316 Stainless Steel Outer Material : 304 Stainless Steel (1Cr17Mn6Ni5N) Plastic Parts : Food-grade PP Plastic Seal Material : Food-grade Silicone Insulation Performance : At room temperature (22°C), when filled with 95°C hot water, the temperature remains above 45°C after 6 hours. Standard : GB/T (Stainless Steel Vacuum Flask) Instructions for Use * Children should use this product only under adult supervision. * Wash the inside with warm water before first use. * For better insulation, preheat with hot water or per-cool with cold water before filling. * Tighten the lid securely (clockwise) to prevent leaks. Precautions 1. Do not overfill with hot water to avoid spills and burns. 2. Avoid dropping, hitting, or exp ...