I'm using the term mess kit more in a generic term, really I'm just needing a pot and a pan or 2 to fit in a compact package. It's not needing to be the traditional military mess kit setup. If I could get a cup and utensils to all fit in that same compact package, all the more better.
I have a couple of different set ups, one in stainless steel and cooper coated bottoms..IMHO, the copper coating doesn't make the slightest difference..In fact, I'd say your far better to allow the outside of the utensils black up...
One set I have just bought on recommendation from somebody here is the Stanley Adventure Cook set, which is stainless steel. It comes with two double walled plastic cups which nest inside.
I use just the one cup, and find can I put a Primus gas stove and an inverted MSR gas cartridge into the "pot" and still get the lid on, which makes a nice compact set for hiking ect and is relatively cheap. To finish off my set up, I need to knock up a foil wind shield when I get a minute or two..
If you search on Youtube there are a few reviews of it..
The Stanley pot will also apparently nest inside a GSI stainless cup, and should you want to brew up using this cup, the Stanley lid will also fit the GSI cup.
Regards,
Peter