You know, I could use one of the Bags I got from the Trooper and build up a kit like this and have room for additional items. Throw it all on a nylon belt along with a good knife and sharpener and just leave it in what ever vehicle I am driving that day. Yeah that would work! I could even build up my 511 push pack, which might work even better. I would have room for a SS bottle and a GOOD space blanket.

I like these, with a hood and "Pockets for your hands"
Superinsulator SPACE Brand All-weather Blanket. I have one in blue and one in red.