We have been using an assortment of pots and pans to camp with and being a mixed set, nothing fit inside of anything and it made for a big clumsy storage problem. I think we solved it with the GSI Bugaboo Cookset for 4. It all fits inside of a waterproof sink bag. It come with a 2 qt and 3 qt pot, a fry pan, pan holder, insulated mugs, bowls and plates, and strainer top lids. It is all aluminum with teflon coating. Have not used it yet but it did reduce our camp kitchen considerably.
Ah, yes, the high tech spondonical. That is what sold us on this set. Other sets seemed to employ a simple fribitz or even a low tech hoodicai but the spondonical did it for us. Harumph!
I too am a big fan of the GSI Bugaboo sets. The folding spondonicle that fits inside one of the cups is very nice. One of the sets also came with a folding, actually telescoping, spork.