First post in the forums, so I don't know if this has been considered before, but has a key ring been considered as a specialized container, like the spice rack or element pouch? It would be a bit more slick than just having a bag dedicated to keys. One might even be able to earn/craft/collect master keys (i.e. keys that aren't spent, but would have a once-per-day use) to put on the key ring.