An oft cited complaint about the Red Rising insert is that it cannot be stored vertically without most of the player cubes spilling all over the inside of the box.

There are a few solutions that have been presented to solve the problem. This is mine.

These are a quick and dirty design with pretty loose tolerances. They sit loose enough in the wells to be easily extracted, but not so loose that cubes can slip through.

You will need to print one of each.