Cardboard Box with Foam Inserts

From Looney Pyramid Games Wiki

This cardboard box was repurposed by Myron Fairweather in 2012. It measures 17cm × 17cm × 4cm. The cells are made from 12 pieces of interlocking 5mm foamboard, and are designed for the pyramids to hang snugly upside down. Each cell measures 24mm × 24mm.

Each cell is 24mm square and snugly holds the trio without any rattling.

The size of 30mm × 30mm was initially used for the cells, but was rejected due to too much rattling around.