What items should be in a bare-minimum first-aid / emergency kit? Yesterday I was hit by a car; very minimal injuries and overall a very minor accident--but in hindsight it's made me realize I was ill prepared and really should have a small emergency kit with me at all times.

This kit would be for true "emergencies" only, not bike breakdowns.  If I find myself injured--or others find me injured and unconscious--what items and information should I have with me?

This kit should:


contain the bare essentials
be very compact and convenient to either transfer between bikes or build one for every bike
durable with very little maintenance
obvious to bystanders and/or emergency responders so that it will be found and opened if need be
Water
Some sort of antiseptic, ideally something like a small bottle of Betadine, though regular ointment/cream will do fine, and it wouldn't hurt to have both
Gauze pads, in a couple of sizes
Adhesive tape
A few large Band-Aids
Some tissues or cotton pads for wiping off a wound


And, of course, cell phone, money, and ID (placed somewhere where people can find it).

I have my name, address, emergency contacts, etc on a gummed label stuck to the top bar of my bike and covered with clear tape