Summary

Experimenting with OpenSCAD - a simple holder for any type of pod or disk. On my printer the fit is pretty tight with the 38mm & 31mm size

Keurig pods have a top disk approximately 61mm wide (outer diameter), with the pod body being 46mm wide (inner diameter).

//Nespresso pods have a top disk ~37mm wide, with the pod body being ~30mm wide. I added 1 to the pod dimensions to give a little clearance, but it could probably use a little more.

The circle resolution is an OpenSCAD parameter - the higher the number, the more segments in the circles (the more circular).