100% FOOD GRADE aluminum lining High Quality: The insulated lunch bag is lined with thick food grade aluminum foil, padded with high-density EPE foam, and the outer layer is made of high-quality waterproof fabric, dual SBS zipper is smooth and durable. Exquisite sewing technology makes these reusable bags more reliable and durable. Good Insulation: The insulated lunch box can keep your food hot or cold for hours, which is perfect for carrying a person's lunch or breakfast. If you put the small lunch bag in a backpack, the insulation performance will be better. Easy to use: The universal size is suitable for adults and children. The small size makes it easy to carry lunch and snacks to the office or school, to carry small personal items or medicine on hold with you, it can also be used as a makeup bag. Portable: Its compact, rectangular shape fits neatly into a backpack, purse, or suitcase. It can be compressed and folded, so it does not take up too much space. Good Insulation Portable: Its compact, rectangular shape fits neatly into a backpack, purse, or suitcase. It can be compressed and folded, so it does not take up too much space. PERFECT GIFT