1Zpresso
Plastic-free almost incidentally, because a precision hand grinder is an exercise in machining metal: CNC bodies, steel or titanium-coated burrs, and metal catch cups mean the grind path and grounds only touch metal. 1Zpresso doesn't pitch this as a health feature — it's a byproduct of building a rigid, repeatable grinder — so where plastic does turn up it's in incidental spots like an adjustment dial or the bean hopper, not the food-contact surfaces.
How clear are their specs?
Grind-path materials (burr steel, titanium coating, aluminum) are named clearly, but the brand talks about grind performance more than a full material breakdown of every knob, dial, and hopper part.
