The lunch bag is made of reusable paper + EVA aluminum film, super strong, reusable, water-resistant, and leak-proof. It has a silver insulated material inside that makes it an intelligent paper lunch bag, keeping food fresh, cool, or hot. It’s a perfect present for everyone, creating your own lunch bag design with personalized doodles. It can be used as a lunch bag, shopping bag, picnic bag, or milk storage bag for work,office, and school.