I'd add power bars or similar. Small silnylon tarp. Cut all but one form of anti-inflammatory, add benedryl and pepto. The water purification tabs are a good idea. Won't you already have bandaids/tape/gauze in your flight suit pockets? Either windproof matches or a Blast Match. Cotton balls or dryer lint soaked in paraffin or vaseline. Compass. Greatland Laser.

Search on Altoids Tin survival kits... you'll find some good stuff there.

Are you flying R/W or F/W?