Made of stainless steel and PP material, this lunch box is quiet suitable for those who are too busy to cook. Water-fillable heating insulation design, perfect for preparing food, storing, organizing and organizing food. Suitable for home, work, school, picnic, etc, safe for children and adults, ensuring that you can enjoy delicious food every day. Feature - Color: Black. - Material: Stainless Steel and PP. - Heat Preservation Time: Approx. 1-2 hours. - Capacity: Approx. 700ml per layer. - Monolayer Size: Approx. 12 cm / 4.7 x 5.5 x 5.5 inch. - Double Layer Size: Approx. 19 cm / 7.5 x 5.5 x 5.5 inch. - Three Layers Size: Approx. 26 cm / 10.2 x 5.5 x 5.5 inch. - Four Layer Size: Approx. 32 cm / 12.6 x 5.5 x 5.5 inch. - Made of stainless steel and PP material, safe, and practical for use. - The sealing ring is close to the and has good spill resistance. - Silicone ventilation holes to prevent the lid from being opened by air pressure. - Trapezoidal buckle, not easy to fall off. - Water-fillable heating insulation design, perfect for preparing food, storing, organizing and organizing food. - Suitable for home, work, school, picnic, etc, safe for children and adults, ensuring that you can enjoy delicious food every day. Package list: 1 x lunch box