Leakproof, thermal stainless steel lunch box keeps food warm for children/adults, school/office

1. Made from food-grade materials and high-quality stainless steel, it is non-toxic, ensuring health and safety. 2. Curved handle for more comfortable carrying. The ring seal of the lunchbox provides a good airtight seal. 3. Easy to clean, convenient, low-maintenance, and environmentally friendly. 4. Can keep food warm for 3 to 4 hours (but this varies depending on your location, climate, and temperature; the exact time cannot be guaranteed, this is the heating time). 5. The vent design makes opening the lunchbox much easier.