Here's a short list of stuff you could pack in your Film containers:
1. Matches and the striker. (you need to pack them very carefully, so they do not light themselves!!!)
2. Some dry Tinder. (use the Best Tinder you have and save this for when nothing else works.)
3. Some Safety Pins, Thread and some Needles.
4. A Fishing Kit with:
Hooks (different sizes).
Fishing line (wrap it round something, or better still wind it onto a 'Bobbin' from a Sewing Machine).
Swivels.
Split Shot.
A small Bubble Float.
(You probably won't need this right away, but it's worth packing one for later).
5. Some Herbs and Spices. (I have one for making food "Italian" and another for "Indian" stuff).
6. Parmesan Cheese.
7. Anything else you fancy when you raid the Kitchen for Supplies!
If you wrap different coloured insulating tape around the outside of the containers, you can tell straight away whats inside (Green = "Italian", Red = "Indian", Yellow = Parmesan Cheese) and you can also use it to make coloured tips for Stick Floats when Fishing, and use it for repairing stuff too.
If you ask in a Photo Shop or a Chemist's, you can probably get enough Film Containers to last you for Years, for free!