On the 35 mm film containers, possibly an even better use is a compact container for disposable medical gloves. You can just wedge a pair into a container and snap the lid on. And when you need a pair, they're there; and if another responder needs a pair, you can pull a container and toss it across a room at them. I keep several pair in a few 35 mm film containers in my go bag (also several pair more loosely packed and available). There is of course an issue with wedging nitrile things into small spaces for extended periods - they may age, develop cracks and rips. I think that's an issue with nitrile gloves in general imho. So use them within a reasonable time. When my gloves start to age, I'll use them while cutting chicken, making burger patties etc.

I do recommend grabbing some film containers before they go the way of the Dodo. A couple years back I stopped at nearby Omega Photo, and asked for some for our Scout Troop. They gave me a bag of about 100 and I still have at least half of them. But even pro photogs won't shoot 35 mm forever, and they'll get scarce eventually.