There's really nothing to a french press that will make one brand different than another one. As long as it's leakproof in a travel one, and as long as it doesn't let the grounds get past the screen, they are all pretty much the same.

I believe the largest french press is 12 cups, which some define as 48 ounces and others 51 ounces, so you should be able to find anything from one to 12 cups.