I was using a broccoli rubber band as a wallet for years but they have a tendency to break after a while. Have settled on a metal binder clip and it’s worked much better - less friction in/out of pocket too
I have occasionally bought broccoli that I didn't need just so I could get another rubber band, after my previous one broke. They typically last 2 months or so.
I found popsockets and ring holders a better option in that regard https://image.gsmpunt.nl/blog/image/image_3.png
Oh so this is what those weird phone attachments are called. Thanks!