I stumbled across this website
and I was like DUDE those are cool! then the cheapskate in me said, DUDE make them instead!!! So I did an experiment with an empty oatmeal container and a grommet, and it worked like a charm (a free charm at that). The only downfall is, of course, the container was Quaker-Man colored instead of clear. But this website has lots of neat knitting gadgets, anyway, even if you don't like the yarntainers, plus patterns, yarn, and all that .