I've been using coffee cans too, as well as plastic jars (like peanut butter jars). Works nice as you can spray whatever down with wd40 or whatnot, and write with a sharpie on the lid whats in it.
The cardboard thing is a new one to me though, thanks! Now I have a legitimate use for all those beer 30 pack boxes! "Honey, I need more beer to help sort all these nuts and bolts." :)
