French press
OK, guys. I own a cookware store, and I buy and sell lots of french presses.
The easiest ones to come by that travel well are a plastic one sold by Starbucks, and a considerable more expensive stainless steel one sold by Freiling. Everything else has glass parts or falls somewhere in the middle. There are also similar apparatus for milk frothing, as well as the sort of battery powered toothbrush style, that I don't like as much.