Store 4 cans soup and 1 bottle vinegar
Store 4 cans soup, 2 bottles vinegar and stock cubes/liquid
Soup: Because it's so easy to make up when you're short on fuel resources. Make sure you store a little extra drinking water to cover the soup you are storing.
Vinegar is very handy for so many 'wierd' reasons. There are 1001 of them here: http://www.vinegartips.com/Scripts/
I use vinegar mainly for cleaning purposes, but I do use it to drizzle over a leg of lamb before I season it and roast it. It makes it very tender. Yum!
I also use vinegar for a citrus zest cleaning solution. See this post for information: http://denleydiaries.blogspot.com/2011/08/orange-vinegar-cleaner.html
I did try and make a pineapple vinegar at one point, but it smelled so bad I had to throw it out. I may have forgotten to stir it every day to introduce oxygen. If you want to know how to make it, the instructions are here: http://down---to---earth.blogspot.com/2009/11/wild-fermenting-making-vinegar.html
Stock: Oh what would I do without my bacon stock cubes! I use them in soups, chowder, savoury mince, meat patties, and sometimes in a creamy sauce I cook chicken in.