It's a simple accessory to store classic earbuds. Like my "Wide Tooth Comb" I used thin birch plywood with macassar veneer. A clear spray coat makes it waterresistant.
I used Solidedge to create the drawing and Fusion360 to extrude and roundover the edges. The stl is not tested yet.
The build was done on a desktop cnc-machine by Stepcraft.
Visit https://www.zenziwerken.de/en/ for more interesting designs.