Hats off to Black Isle for putting in the gem bags and scroll cases. How about adding a key ring to the container list? Something tells me a key wouldn't take up the same inventory space as say...a suit of full plate mail.

Well, there is the Bag of Holding...

Well, it would be nice if you could put the keys in the gem bag, since they're about the same size as some of the stones you find. Of course, most of the keys don't serve much of purpose once you're out of the area you use them in, so there's no real need to keep them. Although if you're really attached to them, you can always find an empty chest and put them in there -- they won't disappear like if you leave them on the ground.

Just remember which chest you put them in!

In BG1, I remember having to look through nearly every house in Beregost trying to find my stash that I'd put there in a previous chapter...

Or a potion case? I know I could use some of those.