This box isn't as sturdy as the smaller sizes for holding heavier cakes.
Merchant Response:This box is made of thicker material than our smaller boxes. The difference in feel is due to the size of the box. This is a full sheet box and has a lot of surface area so may not feel as sturdy as our smaller 4x4x4 box. Typically, a cake board is used with this box to hold heavy cakes. We are also working on a corrugated full sheet cake base that might suit some projects better.