Wireless earbuds holder (or other small EDC)

EDIT: Added Fusion360 file or easier remixing, internal diameter and lenght are parametric.

Heads up, the parameter for internal diameter should be set 2mm wider than the actual result, I made the inner wall 1mm thicker at one point so the thread doesn't make it too weak. 

Second heads up, I think changing the width much would break the thread, so it may not be as easy as just editing the parameter.

I already blunted the thread in the CAD to make it a bit more forgiving, but I recommend to first close it and release it repeatedly in small increments until you reach the full tightness a couple of times, so that the threads can wear and settle a little bit. If you try to fully tighten it right away, it may bind up.

The filleted upper edge of the cradle is small enough to print ok without supports, but I did paint some on mine, just for safety, and the results were good.

Please note that there is a notch on one of the sides of the cradle, to mark where the cradle opening is, so you don't accidentally open it upside down and spill the earbuds on the ground.

The recessed mark can be colored to make it stand out more.