Boil-In-The-Bag

You definitely don't want to use traditional freezer bags to boil. Neither manufacturer recommends it.

Check these out. http://www.mqpackaging.com/cookingbags.htm

Like Joe suggested, I’ve heard oven roaster bags will work for this (though I have not tried them myself).

You could also try sorbent systems bags here and here.

For submerging meals in a pot of water try Food Vac bags. They are rated for it. You can even get precut quart and pint bags.

Vac bags are much heavier/thicker than freezer bags.

Here are some Boilable Bags that are rated for submerging in boiling water. Also some Cook-In Bags that you can use to rehydrate your meals in.

http://www.packitgourmet.com/Packaging-c76.html

I've always used regular freezer bags without a problem. I don't put them in the pot, but rather pour the boiling water into them and then put them in a cozy of some sort, usually my hat. I have never had an issue.

No you wouldn't have issues doing that… However if you put them into a pot of boiling water which is what the OP was asking about, you would have an issue.

My boys in our troop cook scrambled eggs in heavy freezer bags by placing them in the boilling water.

I found these. Don't know if they will work for this particular application.