Well, the plan is to have food bags of different sizes and fasten a screw lid to them. That way I can carry all my pasta in one bag, and all my mashed potatoes in another, and put them all in a large, light stuff sack. The point is not having to search through loads of small bags (20 just for a short week) in order to find what I need, and in addition I'll avoid loads of garbage. It seems a good idea to me, but it was way harder than I thought getting hold of some non-toxic waterproof fabric!