Vacuum Insulation Heat Preserving lunch box

- Freshness and temperature lock, large capacity vacuum heat preservation pot - The vacuum inner tank is copper-plated to effectively block heat dissipation - 4-layer temperature locking process, inner tank grinding layer, 304 stainless steel inner layer, high vacuum insulation layer, stainless steel outer layer, wear-resistant spray paint surface layer - SUS304 food-grade stainless steel material, safer and more reassuring, mirror inner tank, easy to clean and does not hide dirt - Thickened handle, rivet connection, reinforced and durable