When I was in Ranger Batt we used to get a lot of M142 firing devices. We never really used the booby trap devices except to booby trap each others rooms but the cans made excellent survival containers. Basically a giant Altoids can.
(There were also coveted plastic versions that you could use as Copenhagen containers, they would hold like 2.5 cans of dip.)
Like MtnGoat said, seal it with tape, I liked electrical tape for that.
Another point would be: When was the last time we had a survival/E&E situation that warranted that much equipment, cost, and space? Marcus Luttrell? Scott O'Grady? "Gene" Hambleton?
I always had on my person: A trashbag (for water), a lighter (for fire), a knife, a piece of VS-17 panel, and an American Flag. I always had 550 cord and 100mph tape in my kit and ruck. SERE School taught you the rest that you needed to know.
Fish hooks? Not a lot of fish to be caught in the Helmand river and you can use a grenade for that, it's not even that loud!

The idea of Hooah Bars stashed around your pockets would get you a lot farther than fish hooks IMHO. Not to mention SERE taught you how to make fish hooks if you need them.
Antibiotics, iodine, and bouillon cubes I see the benefit in, but it has to be durable and then you need a "kit" to keep them safe. A kit reminds me of the Army's version of the "Blowout kit" for GSWs. The ones individual 18Ds made for their teams were small and would fit in your modified sleeve pockets. Then on my second tour to A-Stan they handed out the IFAK kits that took up a whole section of your IBA. I took out the Chitosan bandages and vacuum sealed them in with the sleeve kits so my guys wouldn't have to wear those ridiculous things!