I made a compact toothpick holder for my toolbox.
Mostly used to repair striped out screw holes for doors and cabinetry.
A few toothpicks and some wood glue does wonders!
If you can, print the cap with TPU filament. (the flexible stuff). But stiff lids work too.
If the threads don't go on smoothly the first time, run the pieces under hot tap water (120 F) for a minute or two and try to screw them on again, working it back and forth.
Enjoy!