[Keep warm and cold]- The lunch bag is made of Oxford cloth + pearl cotton + PEVA aluminum foil, which has excellent heat preservation. Hot meals can be kept warm for 12 hours and cold meals can be kept warm for 8 hours. [Wide opening design]- The top of the lunch bag can be opened with a strong zipper, which means you can put the lunch box in the bag and take it out horizontally. The wide opening design is easy to access and prevents liquids from leaking out of the container and dirtying the inside of the bag, saving you time cleaning. 10.4 long, 7.2 wide, 11.2 high. The maximum capacity is 13L, which is enough to store 20 cans of Coke (330ml) or your lunch, such as sandwiches, salads, snacks, drinks and fruits, etc. [Double-layer design]: The upper layer stores commuting supplies and the lower layer stores food. Make your commute easier and more convenient. There is a mesh pocket on the upper layer, which can store: mobile phones, chargers, hand cream, keys, bank cards, tissues, etc.; the lower layer can store hot and cold food and drinks, keep warm and cold, and prevent leakage.