Bart: Thanks for the reply, I only wanted to comment on the contents of MREs to note that they have metal in the food packets and a heater which probably couldn't fly. I have some cases of MREs rotated out of my household emergency food supply and I had wondered about using them onboard a no-food flight as a BYOF. Since the heater is within the main outer bag, I would have to open that bag and remove the heater. If I understand you correctly, the remaining items would be OK to fly? (I also understand the accessory packet has a book of matches, so the limit would be 4 per person unless they were removed)

As a way OT comment, the old brown MREs from years ago had several menus which had beans as a part of the meal. Printed on the entre bag was something like "BEAN COMPONENT, NOT FOR AVIATION USE". I guess those may have trouble getting on the plane