I know that there are a lot of this kind of coin holders on Thingiverse. I just suggest to use vase mode to print it.
There are premade holders for russian rubles. Also you can customize it for any coins using vase_coin_holder.scad file.
Check out more of my customizable stuff: https://www.thingiverse.com/al0ha/collections/my-customizable-stuff-openscad
Notes:
In Cura check Experimental -> Spiralize Outer Contour.
Also make sure that your Bottom Thickness >= 1mm
Category: OrganizationThe author marked this model as their own original creation. Imported from Thingiverse.