Bialetti
A design old enough that plastic never got into the brew path — coffee moves through aluminum or 18/10 steel and out the spout, with plastic confined to the handle and knob you hold, not the water. The gasket is silicone (rubber on older units), a functional seal rather than a food-contact surface. Bialetti doesn't market itself as plastic-free; the moka pot just happens to keep plastic on the outside. The main caveat is the classic Moka Express body being aluminum, which is a separate metal question, not a plastic one.
How clear are their specs?
Materials are named plainly — aluminum vs. 18/10 stainless per line, silicone gasket, plastic handle and knob — and they're visible on the pot itself. Little is hidden.
