Cooking in a bag?

“Let's see.....
I got to rehydrate my food in a ziploc bag (carrying it with me during the day). Then boil enough water to be able to dunk my ziploc bag in, in a pot that is big enough not to touch the sides, just because I don't want to carry an extra 6 oz of water and 1/4 of a 3M scrubby sponge to do the dishes?

Excuse me a minute, I'm gonna go drill holes in my walking stick to save weight.”

“And, then I gotta haul trash the trash around for days?”

“When on the trail, I cook in and eat from my bag every morning.”

“Sleeping bag, that is!”