Boroux
Specs clearly published boroux.com ↗
Genuinely minimizes plastic in the water path: filtered water lives in a 304 stainless chamber and leaves through a steel spigot with a ceramic valve, so what you drink hasn't sat against plastic. Plastic is pushed out to the filter housing itself — hard to avoid in an activated-carbon element — rather than the storage or dispensing surfaces. It's a steel-first design, not a steel veneer over a plastic interior.
How clear are their specs?
Names the steel grade (304), the carbon filter media, and the ceramic spigot valve, and backs the filtration claims with WQA certification to specific NSF/ANSI standards.