My lab has a foosball table with four different ball types. We sometimes don't like to use certain balls in a game, so I designed this ball caddy to store the unused balls on the table.

This was designed for 35.8mm balls.

You can view and download the OnShape document, but I don't make any promises that this document will remain public indefinitely: https://cad.onshape.com/documents/b54fec9580962afe28193804/w/f4ef75759543a032c10f253d/e/d3868f347030f119a706bd79