Manufacturer source
The strongest non-lab signal in this catalog. The product, brand, or manufacturer documentation makes a direct PFAS, PTFE, coating, material, or reduction claim that can be checked against stored source URLs.
No microplastics is the standard
TheUncoated is evidence-first. A product is not promoted as a strong pick just because it says clean, non-toxic, PFAS-free, BPA-free, PFOA-free, natural, or eco.
The review standard
Every product is evaluated against product data, material signals, plastic-shedding risk, synthetic polymer contact, category risk, source URLs, confidence, and uncertainty notes. The goal is not to prove lab safety. The goal is to keep synthetic polymer contact and shedding materials out of recommendations and show what remains uncertain.
Material-based evidence
Used when the relevant food-contact or skin-contact surface is a simpler material class such as stainless steel, cast iron, carbon steel, glass, borosilicate glass, cotton, wool, linen, hemp, or similar lower-risk material signals. Synthetic shedding-prone materials are not treated as strong material evidence.
Mixed material caveat
Used internally when a lid, straw, gasket, liner, coating, textile finish, or silicone part is a separate contact part. For public recommendations, synthetic polymer contact fails the no-microplastics standard.
Synthetic shedding caveat
Used when polyester, nylon, acrylic, fleece, microfiber, EVA foam, PVC, vinyl, polyurethane laminate, or similar synthetic materials are part of the relevant contact or wear surface. These products should not be ranked as clean wins only because they avoid one PFAS claim.
Brand claim
A useful but weaker signal. The retail listing or brand copy makes a relevant claim, but the evidence is not as strong as clear manufacturer documentation or simple material inference.
Cleaner alternative
Used for products that may be useful substitutions because of simpler ingredients or materials, but are not treated as proven PFAS-free unless stronger product-specific evidence exists.
Weak claim or none
Products with vague clean, non-toxic, ceramic, waterproof, nonstick, stain-resistant, or PFOA-free-only claims are not treated as strong PFAS picks without additional evidence.
Mixed materials
A stainless steel bottle with a plastic or silicone lid, a glass container with a plastic snap top, or cotton clothing with hidden spandex layers is reviewed by contact parts, not by the main body alone. A simple main material does not override synthetic polymer contact.
What gets demoted
Polyester, nylon, acrylic, fleece, microfiber, EVA foam, PVC, vinyl, polyurethane laminate, synthetic waterproof layers, nonstick coatings, stain-resistant finishes, BPA-free-only claims, and plastic-contact claims get extra scrutiny or exclusion. Those terms often describe performance or partial chemistry, not the full food-contact or body-contact surface.
What gets indexed
Guides are published only when they have enough reviewed products, credible sources, original educational sections, and product evidence before and after embedded product picks. Thin pages stay out of the public guide index until they improve.