Staub
Plastic-free where it counts without making a campaign of it: the enameled cast iron cocotte ships with a metal lid knob rated to 500F, so there's no plastic knob to swap out the way some competitors require. Between the vitreous enamel and the all-metal hardware, nothing in the cooking surface or lid is plastic. A quietly plastic-free Dutch oven by construction.
How clear are their specs?
The materials - enameled cast iron with a metal knob - are simple and visible, and Staub is explicit that the knob is metal rather than plastic out of the box.
Lead testing disclosure
Staub/parent Zwilling claims its enamel is lead-free, cadmium-free, and Prop 65/FDA/EU-compliant, but does not publish a dedicated safety page or actual test numbers. A Zwilling USA customer-service statement confirms third-party certified labs test the products but says "we cannot release the findings as they are proprietary" - an explicit refusal to disclose results, not just an absence of data. Independent XRF testing (Lead Safe Mama) of a gray Staub cocotte found the enamel and knob non-detect for lead, cadmium, arsenic, and mercury, but that is third-party testing, not something Staub itself publishes.
- manufacturer https://theskillfulcook.com/is-staub-non-toxic/ cites Zwilling customer service confirming lab testing occurs but declining to release results as "proprietary"
