This is an insert to hold the parts to the Codenames game. It will fit nicely in the original box without the cardboard insert, but with the rules booklet on top.

I also realized that you can play multiple games of Codenames simultaneously with one purchased set by using different subsets of the word cards and one key grid per game. All you need in addition to the standard parts is some way to mark the guessed words and a stand for the key grid. This insert includes a "trough" for some poker chips to use to mark guessed words and spaces for two more key grid stands (also included). If you use cheap, thin plastic poker chips like I did, you should be able to fit 52 of them (9 red, 9 blue, 7 white and 1 black for two additional simultaneous games) in the trough.

My Bukito printer doesn't have a big enough build volume to print this in one piece, so I broke it up into 6 pieces for the insert plus a separate stand.