I too am experimenting with a Nalgene bottle survival kit
Here's the contents list. Any suggestions ?

1. 32 oz lexan colored nalgene bottle
2. Olicamp space saver cup to fit bottom

Cutting Implements
3. Atlas SAK lock blade with saw, file, awl, pliers etc
maybe a small scalpel blade/ shapening stone

Signalling / Orientation
4. ACME tornado whistle
5. Princeton Tec Pulsar II led
6. Suunto Clipper Compass
7. 2x3 signal mirror

Repairs
8 sewing kit with 1 large needle, 1 small needle 10 safety pins
9 Duct tape - flat roll (dunno length)

Fire
10. Coghlan's emergency tinder kit(permanant match with 8 waterproof tinder cubes)
11. 2 tea lights
12. 1 disposable lighter
13. 1 box storm matches

Food
14. 10 assorted fish hooks, 5 swivels , 20 split shot, 30m braided fishing line 40lb test, 10m leader line 20lb test
15. 30 water purification tabs (aqua tabs)
16. 20 feet stainless wire
17. 2 -3 premade snares
18. 2 candy bars
19. some hard candy
20. 2 cup a soup/ seasoning cubes
21. 2 tea / sugar

Medication
22. 10 paracetamol, 10 diphenoxyate/atropine, 10 polaramine, 10 cipro 500mg
23. Assorted bandages / tape
24. 30ml providone iodine

Folding stove with 2 esbit tabs
space blanket
30m paracord braided and wrapped around bottle.

All this goes into a stuff sack. Any thing I missed ?