Here is my Get-Home-Bag. It has been built mostly out of stuff I got for free and lives in the trunk of my car.
Stuff not pictured, but I would have if needed are:
A SAK, Doan bar and mini flashlight (always in my pocket)
a wool blanket, a coffee can, a sleeping pad, umbrella, 3 more 8 oz bottles of water.
so here is the bag itself:

Cost: free
In the flap pocket:

Maps of AO: free at AAA
2 cliff bars: $2
Gatorade mix: $.30
Sunscreen: $3
In the WB pouch and back pouch:

1 Liter Steel Bottle: Free
Emergency flashlight/Lantern/ Radio-Weather band/ clock: Free (gift)
First Aid Fit

Container: free
Contents

Some was free, some not: lets say $2
Front interior pocket

Lil' Folder (I filed the serration off, as I do not plan to slice bread with it): Free (gift)
2 12 hour light sticks: free
2 zip-ties: $.10
pack of tissue: Free
Ulu knife: free (gift)
Handkerchief: $1
Rear interior pocket

Notepad and pen: Free
Reading material: Free (gift)
Shelter

Cordage: Free( left over from moving a couch)
Poncho: Free (gift)
Emergency Blanket: Free
Handy stuff

Bag of tissues: free
Zippo:free
Coffee filters all in plastic bags:free
Brew Kit

in bag

steel cup: free
lint: free
home made fuel tabs: Free
Home Made candle:free
Tin a: B-day beeswax candles and matches: $.50
Tin b: tea and honey: $.50
Tin c: nothin' yet (suggestions?)
Extra Clothes

beanie: free
tshirt: Free
undies: $1
socks: $1
big scarf: $4
Protection from the elements

Hat: Free
Anorak:$20
In case I cant find any

2 Bottles of water:$.90
There you go. What should I add? what do you like? Thanks for looking.