..."My concerns with the nalgene:
1) No nesting stove (although I'm fairly certain a small stove wouldn't be too much trouble to take along)"
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Actually, it now turns out that you can buy stainless steel cups that fit over the end of a nalgene bottle. I just discovered this myself during another thread on this forum. It's quite a smart little idea for survival gear. So yuor cup and bottle nest together.

Then in a real survival situation you use the SS cup for everything. Put it over a small fire and use it to heat soup or tea. Use some aluminum foil to seal the top to retain heat and water vapor.

I haven't bought one of these SS cups yet ... but I certainly plan to!

Pete