My son loves Yo-Kai Watch and has a bunch of medals that go into his watch. I could not find any holders that fit the dimensions of his medals, so I made one in TinkerCad.
The solid ones should be printed in vase mode. I have not printed the holder or lid with the hole yet, but in theory it should work. Let me know if you make one and it needs to be tinkered some more please. ^_^
Use vase mode or spiralze outer contour mode for solid models.