I saw the note there about the Aeropress mini. It fits all standard aeropress kit, its just shorter. So far its my "travel" coffee maker, until I can get new parts for my Cafflano Kompresso. Overall its a better travel package than walking one, but for a couple nights wouldn't be too out of the question, as the cleanup is still better than a lot of the paperless cone options.
As far as nesting, it all fits together quite nicely. I tote it in a 3L sistema box with a small GSI insulated cup, and nalgene food jars for the coffee. Overall I can do a week of coffees in a nice tidy pack. The included cup works very well, and does duty as a carafe if you were making coffee for two to split. Though I tend to not drink from it directly as it is large enough that a two-shot cools faster than I'd like. But would be fine if you were of the americano persuasion.
I'm sure I mentioned the Cafflano before, its good, but the main plunger seal in mine seems to have a problem, and they are still suffering shipping delays (really unfortunate, my grinder from them is very late, but that's the gamble) So its on the shelf for now. For me though, it didn't end up being better enough to make it worth while for walking. I can cowboy it or use the GSI screen, or go turkish if I'm counting grams. Espresso is a road-trip luxury.