Quooker
Leans stainless where it markets - the under-sink tank is steel "rather than plastic or copper" - but this is a plumbed appliance, not a plastic-free showpiece, and the water still passes through valves, filters, and the CUBE's chilling and carbonation hardware where plastic contact is hard to avoid. We rate it minimal-contact for good reason: the steel tank is real, but it's not an all-metal water path end to end. Honest framing, but read it as "less plastic," not "no plastic."
How clear are their specs?
Clear and specific that the tank is stainless, but quiet about the wetted materials downstream in the tap valves, filter housings, and CUBE chilling/carbonation path.
