Polygonal holder for Ledger Nano S or similarly sized objects

This is for items like USB drives or the Ledger Nano S that are less than 20mm x 10mm in footprint. I designed this to hold the Ledger Nano S and give it a good futuristic look. I wanted to make it look like I was pulling out something important and special so I made a simple icosahedron holder for my Ledger Nano S, and made it just tall enough so the O ring stands out. A little centerpiece for my desktop.

What's really special about the shape is that it can be printed without any infill and