I'm looking for a cup that will nest with a 1 quart nalgene bottle. I like the canteen cups that nest with military canteens but for every day use I carry wide mouth 1 quart nalgene bottles. They're easy to fill up and on hot days I can fill them up with ice cubes to have cold water to drink all day. I like the idea of having something that can be used to heat up water or food over a fire. Anyone seen such an animal?