PME Make it Tall Cake Box Extender
With this 'Make It Tall' cake box extender from PME, you provide extra height for your cake boxes, making it easy to transport your cakes and keep them protected. It's especially handy to have in case of cakey emergencies, especially if your cake ends up slightly taller than expected and you're short on cake boxes.
This box extender has been uniquely designed to provide up to 14'' height to standard boxes and fits all boxes from 10'', 12'' and 14''. It's super easy to assemble, without the need for staples, glue or taping.