Timemore
A budget-focused design brand where plastic is a cost-and-function compromise, not a marketing target. The Chestnut C3 gets the headline materials right — aluminum body, CNC stainless burrs, aluminum screw-on catch cup — but relies on a plastic top lid and internal plastic stabilizers, so beans and grounds still meet plastic and the rating is minimal-contact. Timemore isn't chasing plastic-free; it's optimizing for price and grind quality, and plastic is where it saves.
How clear are their specs?
The aluminum body and steel burrs are the selling points, while the plastic lid and internal stabilizers are real but downplayed relative to the metal framing.