
Shelter - A large, contractor black trash bag (3 mil) can be used as a tarp by slitting the sides of the bag. If it is filled with leaves it can be a mattress, pillow, or blanket. Since the thick plastic is already fairly insulating, it can be used as a sleeping bag.
First Aid - In a snack-sized Ziploc I've put 2 bandaids, one liquid bandage swab, a Neosporin packet, a moleskin for blister prevention, and 2 moist towelettes. I have some chapstick with SPF 15 to prevent lipburn.
In another little Ziploc I've put 2 acetaminophen 500mg tablets for pain, 2 diphenhydramine 25mg tablets for allergic reactions or as a sleeping aid, 2 loperamide 2mg tablets for diarrhea, 3 aspirin 325mg tablets for pain, 3 ibuprofen 200mg tablets for inflammation, and 2 antacids. The bandana can be used to secure a dressing or splint.
Money/Barter - I put in a $20 bill and 4 quarters for emergency purchases or phone calls. A prepaid phonecard would be a good addition.
Hygiene - I've included a partial package of travel Kleenex and a thin bottle of antibacterial gel.
Tools/Misc - My secret weapon in this kit is the thin but versatile Victorinox Swisscard. The black case has a red LED, a magnifying glass, and a ruler built in. It houses a small knife, a pin, a pen, tweezers, scissors, and a four headed screwdriver (upper right in the photo) that works surprisingly well. I've included duct tape because it can be used to repair clothing, bandage skin, secure the knife to a pole to make a small hunting spear, shelter construction, etc. It is so useful and versatile that you will likely discover an unintended use in an emergency situation. Mine is wound around a small piece of cardboard that I have attached a couple of safety pins to. These can be used to repair clothing, secure a bandage or can be left open to form a small fishing hook. I've included a rubber band and 2 zip ties for miscellaneous fastening needs. I've also included 12 inches of paracord, but this actually gives me 8 feet of cordage. Each length of parachute cord has a tough outer woven sheath and seven strands of nylon inside that can be used separately or tied together. If I need a really thin thread, these strands can be untwisted to form 3 threads each. I'd like to include a little more, but I'm bursting at the seams as it is. The note card is for, well, notes.
The black trash bag provided one other unexpected benefit - when folded to fit in a quart Ziploc bag, it creates an accordion-style partition for the bag that allowed to separate these items. I tried fitting it into a wide-mouth Nalgene 1 liter water bottle and could almost get it all in, but not quite. Even this package was bulkier than I intended. I'm going to have to lose something - I'm not sure what yet. Nevertheless, it was a fun exercise to get all of this into a small bag. This fit easily into a fanny pack that I owned with room to spare. I need to get it small enough that my wife would carry it. Keep an eye out here for future modifications.