Four Grids Sealed Fresh-keeping Box Large-capacity Separated Portable Lunch Box Heat-preserving Lunch Box Features: Easy to Carry, and, Flexible Lock Catch Sealing Design It is With Insulation Bag Can Keep Warm for 2-4 Hours. Sealed with lid for more fresh-keeping lunch box Sealed with lid for fresh-keeping, meals are locked and fresher You can add boiling water to keep the food warm. The stainless steel inner compartment of the lunch box can add boiling water to keep the Specification: Name: Bento Box Material: Plastic+stainless Steel Application: Outdoor, Picnic, Office, School Package List: 1 x lunch box Note: Size and colours may vary slightly from photos. Due to shooting technology/ambient light/display chromatic aberration, etc. May cause a slight color difference between the picture and the actual product, refer to the actual color