I've been looking and seems like a Klean Kanteen (widemouth, 18 oz) might be the best thing I've seen. It is stainless with a plastic lid. Most of the stainless bottles I've seen have a piece of plastic pressed onto the bottle opening with the threads cut into the plastic. Try cooking in these and your threads melt. The Klean Kanteen has the threads cut into the metal.

Definately not a pocket kit but I think I could assemble a "kit in a bottle" that has some high quality gear and a container that doubles as cooking pot and then carry it in my pack.

Still looking for that pocket kit container though.