Brian, you were one tricky, tricky kid. But I must admit it ties my "NASA hoodie, Khaki pants, socks and sandals" outfit together quite nicely.
Now you can make your own salvaged pocket bag, maybe your girlfriend will appreciate this "purse" as a token of your love/lust (but we know its a satchel), or maybe you will find your own use for it and live happily ever after.
Step 1: Gather Materials
One pair of torn or otherwise ruined/ruinable pants/shorts with cargo pockets
As it happened i used these because i had them already, i will assume that you have at least 2 of 3 already. whichever one you don't have cant cost more than a few bucks.
Step 2: Cut Out Pockets
Using the cutting implement of your choice cut the cargo pockets off of the pants/shorts. Be sure to equip proper safety gear when using said cutting instrument, such as common sense, as it probably will be and should be sharp.
Do not cut the pockets, cut the pant fabric about 1/2" out from the seam of the pocket. This will leave your room to sew them together, since its very hard to sew through the hemmed seam of the pocket.
If you were able to complete this step proceed onward, if not, have somebody else do this and the rest for you.
Step 3: Sew Pockets Together
Leave the top open, creating:
a center Pocket (labeled: a) and two side pockets (labeled: b)
Then turn it inside out, and you should have something looking like my sketch below, without the yellow boxes or the shoulder strap.
Now for those drawstrings....
Step 4: Make a Strap
On the two corners attach opposite ends of the strap, and sew in place with plenty of floss. If you have followed directions well until this point you should be able to sew it onto the single layer of fabric stitched together at the seam you just created, rather than the 2x, 3x, or 4x thick factory stitched seam where the pockets attaches to the plants.
Step 5: Wear It With Your NASA Hoodie, Khakis, Socks and Sandals!
Some may find this useful, i particularly think its really cool. I'm in the process of building a real Messenger bag for school, which i think has a little more street cred than this purse lookalike, but i will always find use for this carrying the small stuff.