These boxes are made from corrugated cartons which are made up of a few layers of material rather than just a single sheet. The three layers include an inside liner, an outside liner, and a medium that goes between the two, which is fluted. If you need a strong and sturdy cake box then this is the perfect solution. The one-piece box design allows the lid to open easily and then tuck back into place to secure the contents. White from outside and brown (kraft) inside, this very strong box is perfect for transportation and storage for your cakes. Ships flat to maximize your storage space.