Large capacity-size 23*18*17cm, with a zippered back pocket, with zipper, can provide enough space for your daily lunch box, can prevent fruits, snacks and other snacks. And provide better storage space for mobile phones, keys and forks.Three-layer heat insulation material-The lining is made of environmentally friendly aluminum foil, and the inside is filled with 3 mm thick heat-insulating pearl foam. The outer protective layer of Oxford is used to keep the food cold/warm/fresh for several hours. And the internal aluminum film is also waterproof and anti-dirtyMultifunction-This soft heat-preserving lunch bucket can be lined with food-grade PEVA material to keep your things cold or warm for a few hours. You can prepare a full meal and enjoy healthy food anytime, anywhere-hiking, traveling, camping , Gym lunch can go to work, picnic, school, explore the beach and fishing. This is easy to clean.Safe material, easy to clean-lining aluminum foil is an insulating safe material that can keep food or beverages fresh/cool/warm for 4 hours. No matter where you are, you can enjoy a perfect tasting meal.