Stacked cake boxes are available at Culpitt: culpitt.com/everyday-basics/cake-boxes/plain-transport-boxes/stacked-cake-boxes
Stacked cake boxes are strong and durable for complete protection of taller celebration cakes. Our stacked cake boxes come complete with interchangeable round and square base cards so the bottom tier of your cake fits perfectly into position and doesn't move during transportation. Each base card has a perforated insert to allow two sizes of cake to fit into each box.
All of our stacked cake boxes are 16 inches in height and can be reused many times due to their strong corrugated cardboard structure.