Pyrex · Muffin Tins
Pyrex Kalup za peko za 6 kolačkov
Lower concern, borosilicate glass baking mold with no PFAS-prone coatings.
Pyrex baking molds are made from borosilicate glass, which is inherently PFAS-free and does not require nonstick or water-repellent coatings. No evidence of PFAS use in this category. Glass cookware is a well-established lower-risk choice for baking.
Shop Pyrex on Amazon →Material
borosilicate glass
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Uncoated safe material
Bare, uncoated material (cast iron, stainless, carbon steel, or glass) with no surface treatment to contain PFAS.
Category baseline
cookware is a category where PFAS exposure is more common.
The full breakdown
What it's made of and why it matters
This is a borosilicate glass baking mold, a high-silica glass formulation engineered to withstand thermal shock and oven temperatures up to around 500°F (260°C). Borosilicate glass is chemically inert and does not leach harmful compounds into food during normal baking use. Unlike ceramic or enameled cookware, there are no glazes, coatings, or liners to degrade or flake into batter over time.
The brand's record and disclosure
Pyrex is owned by Instant Brands and has a long-established reputation for glass cookware safety with no major recalls linked to chemical leaching or coating failure. The brand does not publicly market PFAS-free claims but has no documented use of PFAS in borosilicate glass formulations. No significant safety controversies are on record for standard Pyrex glass baking products.
How it compares in its category
Glass muffin tins are among the safest options in the baking vessel category because they eliminate common hazards tied to metal (potential aluminum or steel coating wear) and ceramic (glaze variability). They are slightly more fragile than non-stick steel alternatives but avoid Teflon-type coating and any coating-degradation pathways. Pyrex-branded glass is a mid-to-premium choice with good thermal performance and minimal quality variance.
If you buy it
Avoid sudden temperature swings (do not place cold mold directly into a preheated oven). Hand wash or use gentle cycles to prevent chipping. Inspect the rim and interior regularly for small cracks, which can propagate and cause breakage during use. Glass muffin tins typically outlast non-stick alternatives and do not require replacement unless physically damaged.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Thermal shock and breakage
Borosilicate glass is durable but not immune to cracking if exposed to rapid temperature changes (e.g., cold mold to hot oven). Broken glass fragments pose a physical injury and contamination risk; proper preheating minimizes this.
Lead or cadmium in glass
Borosilicate glass formulations used in food baking vessels do not routinely contain lead or cadmium. No recalls or documented leaching incidents are on record for Pyrex borosilicate muffin tins.
Coating degradation and peeling
This product has no applied non-stick or enamel coating. The glass itself does not peel, chip, or degrade chemically under normal baking conditions, eliminating a major hazard in coated cookware.
Aluminum leaching
Borosilicate glass does not contain aluminum and does not react with or leach metals into acidic foods. This hazard is not applicable to glass molds.
Microplastics or polymer migration
Glass is inorganic and does not shed microplastics or polymers when heated. This is a low-concern product for polymer-related contamination.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 92% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Muffin Tins
Caraway
Nonstick Ceramic Muffin Pan
ceramic nonstick coating
Lower concern, ceramic coating and MADE SAFE certification support PFAS-free claim, though no independent lab testing published.
⚠Risky category by default
Caraway
West Elm Caraway Non-Stick Ceramic Muffin Tin
Ceramic non-stick coating
Lower concern; ceramic non-stick with credible PFAS-free claim and MADE SAFE cert.
⚠Risky category by default
Caraway
Perracotta Ceramic Non-Stick 6-Cup Muffin Pan
Ceramic (terracotta/clay base)
Lower concern; ceramic base with third-party MADE SAFE certification supports claim, but verify retailer specs.
⚠Risky category by default
More muffin tins grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.