Not looking to nest it. I'm looking for a cup/mini pot with a flush lid that the canteen will sit on top of.
But the nest idea is interesting. That way I could have the pot, with lid underneath and still slide a tin underneath for storage, Hmmmmm. But that being said I'd still rather have a titanium pot or covered mug for storage over a tin.
nested w/ the lid forming the bottom you'd still have room for storage- here's what I came up w/ for my 10x4- it's a maxped "tactical" can pouch
holds my Ti stove, Esbit tabs, couple of wetfire tabs, mini bic and a few candles


another option is specialty bottles- that have several aluminum round tins of varying diameter and height
the Titan specs came from here:
http://bcgear.com/catalog/accessdetail.cfm/MSR157