I haven't tried those brands but I agree "MREs" like that are awesome.

Trader Joes has a plethora of such non refrigeration needed foods for trips! http://www.traderjoes.com/
Cheap too. Usually under $2.49 Their green curry tuna, Mexican lentils and Indian eggplant are tasty. $1.69 for 6 cereal bars is a good deal too. The fig bars taste like fig newtons. Instant noodle bowls are good with canned tuna or chicken added. Many noodle & soup dishes as well. Bagged carrots are a good snack and never miss a chance to take the apples from the hotel. If you have a hotplate on the aircraft, to-go foods can be reheated directly on the hotplate. Otherwise a sturdy ziplock immersed in a pot of hot brew water does the trick too. Always carry extra ziplocks as you never know what you may need to pack! One of our hotels has a continental b-fast and a few slices to go with PB & J packets is awesome- unless the bread dries out at altitude. Ya gotta have baggies. You might make a few cents selling some to passengers at security too.

As far as a travel cooler, this one beats ALL others-
http://www.ebags.com/ebags/crew_cool...?modelid=17719
Not only does it look great and have a mounting strap on the back but it holds 4 days of food easily. A freezer zip lock bag with ice keeps it cold. Additional storage pockets on the top and front plus two zip out water bottle holders/pockets on the sides. It's well worth the price.