I fly monthly.
In my "business/laptop" bag I have one section dedicated to non-business stuff.
25' paracord, multiple bandanas
5+ power bars and other snacks
Powdered Gatorade/electrolyte/caffeinated energy drink mixes
UV Pen water purifier and coffee filters
compass with local and most traveled area maps, emergency whistle
2 drum liners and several ziplock bags
Notebook, pens, sharpee pen
First aid kit with cotton balls and vasaline Chapstick
Work gloves, dust masks
surefire 200 lumen flashlight and 2 other cheapo led lights
Misc wires and spare batteries (think network and USB cables)
USB charger (good for three charges of my phone or other devices)
Cash, silver, etc
nail file (knife sharpener)
SOL space blanket
Deck of cards
Never got more than a cursory glance from TSA. Gal at Disney gave me more of a hard time than any TSA agent.
If you think about it, the core needs are for food, shelter, water, and protection. With TSA and weight limits you can't really carry much. You might could get an ultralight eVent bivy from sixmoondesigns that weighs about 6 oz, pliers and a coiled survival saw could work for protection, a fire steel and petroleum jelly cotton balls are minuscule weight. The Sawyer squeeze filter is very light but they make an even lighter drinking straw that might be better. You could throw in a dehydrated meal and a very basic first aid kit and you'd have a decent bug out kit that might weigh less than two pounds. Throw in a knife sharpener and you could even sharpen the TSA approved nail file![/QUOTE]