How to upcycle Shower curtain rings?

Here is an article that might help you - https://www.onecrazyhouse.com/ways-to-use-shower-curtain-rings/

Use them in your closet to hang up tank tops and scarves.

I use them to hang pots on my shelving in the kitchen and to hang stuff in the shower and I hang my straightener and curling iron with them

Do you want to upscale the rings for other uses? or upscale them to look better? It looks like everyone helped with other uses, if you want to upscale them while using them for a shower curtain you could spray paint them and use puff paint to make 3D dots on them. Use washi tape to cover them .... is that what you mean? Let us know and we'll come up with more ideas. Good luck.