Sorry for the late reply. I was actually busy this weekend do other things that watching the forum. <img src="/images/graemlins/wink.gif" alt="" />

For example, I made the following meal pack by putting each the following in gallon-sized ziplock bag:

(1) tuna salad kit (starkist - comes with 3 oz. of tuna, crackers, mayo packet, relish packet and tiny spoon), (1) packet of lipton cup-a-soup, (1) granola bar and (1) deydrated gatorade packet (makes 32 oz.). This meal kit cost less than $4.00 to make.

Other specific suggestions:
-Retort packs of meat include chicken, tuna, salmon and can all be found at most grocery stores.
-Retort 'box' of Stagg brand chili.
-Hormel makes retort package of meals such as spaghetti, lasagna, stew in microwavable bowl. Given Texas summer heat, I could probably leave them in my car for a few hours to warm up to a decent temperature.
-Retort box of milk (kid sized), packed with snack pack sized ceral box.
-There are some microwavable rice dishes that come in a retort pack, fully cooked and no water added. They just need to be heated. I haven't tried them, but I imagine they would be ok, but very salty.

Hope this helps.