Cage tags and labels discussion

Does anyone else have a tag or label fastened to their cage? I spotted one on Tumbler and got curious. I went ahead and bought a stainless steel heart-shaped version with this inscription on the front:

Property of “My Love” Keep toy locked while not in use

And on the reverse side: Only, Always, Forever

I intend to gift it to her once it arrives. If you have one too, I’m curious what kind of attachment method you prefer? I’ve been testing a key ring today to see if that’s viable, but I suspect it might be causing some random pinching issues. I was considering switching over to those steel ball chains.

Any recommendations?