I find that pill containers are made of washable plastic. If washed and possibly lined with a plastic bag a used pill container could be good for storing herbs as well as anything from the list for film canisters.

Film canisters are another story. That said, I've seen them used for things like Catan letter-counters, a couple of dice, quarters, game money for lots of games... stuff like that. You could also use them for glitterdust. Basically, non-food items are OK. I'd think edibles to be a no-no for those because I can still smell photograph chemical solution when I open them. Soft plastic.