This is a case I bought when I went to see Cirque du Soleil a few years ago. I think it had a sandwich in it. It's cute, so I brought it home as a souvenir, but I've never used it, so it's almost new. It can be used as a lunch box, and when it's empty, it can be folded, so it doesn't take up much space in your bag. You can store it compactly when not in use. *Please refer to photos 6-8 for measurements. When folded, the basket part fits inside the lid (see photo 5). It's made of plastic, and when assembled, the bumps and grooves snap together to create a sturdy, three-dimensional case. It can be used repeatedly. Please refrain from purchasing if you are sensitive to items stored at home.