Actually I don't have a stable relationship with anyone, but if in the future I find "the love of my life", and I decide to make a wedding proposal, something like this sure will be her wedding ring box.
Like the Nintendo SD cards holder (http://www.thingiverse.com/thing:1765326), this is a simple design where I re-used an official Mushroom Candy box for the Nintendo Shop of New York.
Due to the differents rings thickness I made some different designs, as always, you also have the source file (.fcstd, Freecad) to make the changes you need.
Please share a photo if you made one! ^^
Due to the form of the metallic mushroom box, the ring holder moves inside the box, to fix that you can glue the holder to the bottom of the box.