The lining of lunch bag is made of PEVA foil that won't melt easily when the bag hold something hot, at the same time, we use a high quality zipper which will minimize the possibility of broken zipper. The maximum capacity is 13L, spacy enough to store 20 tins of coke (330ml), or your lunch such as sandwich, salad, snacks, wine, drinks and fruits and so on. Great for transporting wine to parties, wine dinners, restaurants, pool or beach parties, picnics, concerts and sporting events. Strong linen handles and heavy duty nylon connect by dense stitching make the bag extremely durable, and proud to carry everything.