I find the argument about pouring boiling water into Ziploc bags interesting. In my past three years of doing AT LASH's, I prepared oatmeal breakfasts by putting the oatmeal in a Ziploc freezer bag along with boiling water. I, too, do not like to mess up a pot since that means it will take water and time to clean it. My dinners have been prepackaged Mountain House freeze dried. This year I intend to buy the cans of Mountain House and repackage in Ziploc freezer bags for use on the trail. The intent is to reconstitute the meals using boiling water like I do for the oatmeal.
I have done research on this subject before and found a couple of sources (including from the Ziploc site) that others might find relevant. Essentially Ziploc freezer bags don't have BPA or dioxins. However, there is opinion that other chemicals are released, but the amount has not been researched in Ziploc bags or other sous vide bags. Take a look at the two articles for more information.
Ziploc Freezer Bags
Cooking in Sous Vide Bags