This is a D20 Dice box that was coded (built) in OpenSCAD. I started with @blepfo's Icosahedron and turned it into a set of modules that allow you to create a printable dice box with 10 holes for 10mm x 2mm magnets.
It's not perfect, and I figure this is my v1. I'm relatively happy with how it came out though. I'd love to see others rework my OpenSCAD file to see what others come up with.
It's worth noting that there are some odd artifacts I've seen in the print and I'm not sure if it's an issue with my printer (Creality Ender 3) or an issue with the model.
Give it a try and let me know what you think.