Moleskin,

Like Glenn, I carry my food in plastic bags and dump it into the water in my pan (after I have extracted my tea/coffee water).

However, I have used the "rehydrate in the bag" system quite a bit. I have used the standard Ziplock brand (the heavy, original version) and don't ever remember tasting plastic.

Like Glenn, I eventually just felt it was easier eating out of my pot, and using a shorter spork. I use my tea bag and maybe a tablespoon full of water to wipe out the pan and I don't worry very much since the next time I use it it will be to boil water, which should pretty well sterilize it.

best, jcp