While searching for something completely different I found set of metal dice, more than twenty years old, from the years I got to play GURPS and Dračí doupě (Czech knockoff of DnD).

So I had to design a nice case for them. There is a lot of designs available, but I was unable to find the right one for my size of dice and magnets I had available (8x4 mm). So I designed one myself. This one is made in OpenSCAD and fully parametric, so it's easy to change the required size.

The magnets are just pushed in, but you can glue them with epoxy or CA glue if you wish.

I used the Prusament Mystic Green and Mystic Brown filament and it looks very nice.

Print instructions

Printed with 5% infill and with archimedean chords as top and bottom infill for looks. See 3MF files for settings.