Pyrex · Bundt Pans
PYREX 22cm 9-inch VTG Patisserie Flan Dish Bundt Pan Cake Ring Jello Clear
Lower concern, glass bakeware carries minimal PFAS risk by material class.
Pyrex flan dishes are made from borosilicate glass, which has no inherent PFAS risk. Glass is inert and does not require fluorinated coatings or water/grease repellents. This vintage piece poses negligible PFAS exposure compared to nonstick or treated cookware.
Shop Pyrex on Amazon →Material
borosilicate glass
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
cookware is a category where PFAS exposure is more common.
Uncoated safe material
Bare, uncoated material (cast iron, stainless, carbon steel, or glass) with no surface treatment to contain PFAS.
The full breakdown
What it's made of and why it matters
This vintage Pyrex Bundt pan is borosilicate glass, a thermal-shock-resistant silicate matrix engineered to withstand temperature swings without cracking. Unlike soda-lime glass or ceramics with decorative glazes, borosilicate contains no lead, cadmium, or enamel coatings that can degrade and leach. The clear formulation means no colorants or pigments, a material class with minimal chemical complexity and proven stability across decades of use.
The brand's record and disclosure
Pyrex has manufactured borosilicate bakeware since the mid-20th century with a long safety track record; no recalls or public health alerts attach to their glass Bundt pans or similar vessels. The brand does not publicize detailed chemical composition statements beyond identifying the borosilicate material itself, which is typical for cookware manufacturers. Pyrex's parent company (World Kitchen LLC) is not known for notable toxicant controversies in glass bakeware, though they maintain minimal transparency on sourcing or contaminant testing.
How it compares in its category
Glass Bundt pans are among the safest options in baking molds; they avoid the aluminum leaching concern of uncoated metal pans and the non-stick coating degradation risk of Teflon-type coating/ceramic nonstick variants. This vintage Pyrex model predates modern ceramic nonstick and many of the Teflon-type coating reformulations, making it a chemically simpler alternative. Metal Bundt pans (steel or cast iron) and ceramic-coated versions carry different thermal and coating-life tradeoffs; glass offers inertness at the cost of heavier weight and breakage risk.
If you buy it
Borosilicate glass is stable across standard baking temperatures (up to 500F and beyond without deformation). Inspect for chips or cracks before use; intact glass poses no leaching risk, but cracks can harbor bacteria and accelerate degradation. Hand washing is gentler than dishwasher cycles and extends the pan's visible clarity. Store carefully to avoid thermal shock (do not move directly from hot oven to cold water), which can cause fractures unrelated to chemical safety but affecting usability.
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.”
Lead or cadmium in glass or decorative coatings
Borosilicate glass formulations used in Pyrex bakeware have not been documented to contain lead or cadmium. Clear glass without enamel, glaze, or painted decoration carries no known risk for these heavy metals.
Microplastics or polymer degradation
This is glass, not plastic; no polymer matrix to fragment or leach monomers. Not applicable to this product.
Coating degradation or non-stick Teflon-type coating/PFOA release
Glass Bundt pans have no non-stick coating; this hazard does not apply. Borosilicate is inherently non-porous and does not require surface treatment.
Aluminum leaching
This product is glass, not aluminum. No aluminum substrate or anodized layer is present; leaching risk does not apply.
Thermal shock fracture (structural, not chemical)
While not a toxicant hazard, borosilicate glass can crack if subjected to rapid temperature change (e.g., hot pan to ice water). Fractures create sharp edges and can harbor bacteria; not a chemical safety issue but a practical durability and injury concern.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 90% 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 Bundt Pans
GreenPan
Premiere Ovenware Ceramic Nonstick 8" Square Cake Pan
ceramic nonstick coating
Lower-concern option; ceramic nonstick avoids traditional Teflon-type coating/PFAS, though independently verify if important.
⚠Risky category by default
Caraway
Ceramic Nonstick Fluted Cake Pan
Ceramic nonstick coating
Lower-concern ceramic nonstick option backed by brand transparency and third-party certification.
⚠Risky category by default
Caraway
Nonstick Ceramic Square Baking Pan in Sage at Nordstrom
ceramic nonstick coating
Lower-concern option; ceramic nonstick avoids Teflon-family coating, and brand transparency supports the claim.
⚠Risky category by default
More bundt pans 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.