Professional Vacuum Insulated Flask with 500ml Capacity This premium stainless steel flask features advanced double-wall vacuum insulation with inner copper coating, ensuring exceptional temperature retention for 24 hours. Whether serving hot tea or cold beverages, the interior maintains perfect temperature regardless of ambient conditions. The leak-proof design with convenient one-hand flip lid allows for easy access while preventing spills. The versatile lid doubles as a cup, enhancing functionality for various serving situations. The robust construction may appear larger due to its insulation system, but delivers precise 500ml capacity as specified. For optimal performance, precondition with hot or cold water and fill to maximum capacity. The included protective jacket (color/design may vary) provides additional insulation and protection while maintaining consistent quality across all inventory. Ideal for tea brands and importers seeking high-performance beverage solutions that preserve flavor and temperature throughout service.zq20260205090428