This product uses waterproof oxford cloth material to make the shell, tinfoil coating to do the inner insulation. It has very good durability and heat preservation. Small size is very easy to carry and suitable for lunch boxes. You can put down your delicious lunch. Thickened double side carry handle design, more convenient to carry out. Also can be used as a cooler bag, picnic bag, shopping bag, grocery bag. Can keep food temperature up to 5 hours. Lunch, fruit, drinks, cold drinks, ice cream can be used. The lining is easy to wipe.