Any recs on a BIFL key chain? Those rings always get bent over time, looking for something sturdy. Might just be a flaw in the design because if you can bend it enough to get a key on, you can probably bend it out of shape over time.
I was thinking about that, but a lot of them seem to take the form of a ring (or multiple rings) attached to a carabiner, which still leaves the rings as a weak leak. I imagine you could slide keys directly on the carabiner if it's not too thick but I wonder if that would have flexibility issues and possibly not be 100% secure.
Hmm, that's a good point. It would have to be a relatively thin carabiner...
While searching for pictures I also found an interesting variant keychain called a "keycase" (picture attached). It doesn't use any rings. Perhaps that's the kind of thing you're looking for?