Pyrex · Bundt Pans
Vintage Pyrex Glass 9 inch Bundt Cake Dish, France
Lower PFAS concern, plain glass with no surface treatment.
Vintage Pyrex Bundt dishes are made from borosilicate glass with no nonstick or stain-resistant coating applied. Glass is inherently inert and does not require PFAS-based treatments. This product presents lower concern for PFAS exposure compared to coated or treated cookware.
Shop Pyrex on Amazon →Material
Borosilicate glass, no coating
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.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
This dish is borosilicate glass, a silica-based formulation engineered to withstand thermal shock and remain chemically inert during cooking. Unlike soda-lime glass, borosilicate resists leaching of silicates or other compounds into food even at high oven temperatures. The absence of any non-stick coating, glaze, enamel, or ceramic finish eliminates the primary pathways for toxic migration that affect coated cookware. Vintage French Pyrex (pre-1990s) typically used lead-free glass formulations, though lead content in older glass is not a reported concern in this product category.
The brand's record and disclosure
Pyrex (now owned by Instant Brands) maintains a long history as a cookware safety standard; borosilicate glass products have not been subject to recalls for chemical leaching or contamination. The company does not publicly disclose PFAS testing or manufacturing details, but traditional glass cookware requires no PFAS-based water or stain repellents. No established safety controversies or regulatory actions affect vintage Pyrex glass bakeware. The French-made designation suggests possible adherence to EU standards at time of manufacture, though this cannot be verified without batch documentation.
How it compares in its category
Glass Bundt pans occupy the safest tier of the baking pan category; ceramic-coated, non-stick, and aluminum pans all carry documented risks (lead in glazes, Teflon-type coating fume potential, or aluminum leaching). Vintage Pyrex glass is chemically superior to modern silicone or plastic molds, which may leach plasticizers when heated. Metal pans are durable but require seasoning (cast iron) or non-stick coatings (steel or aluminum), introducing additional hazard pathways. This product represents a low-risk, passive cookware choice.
If you buy it
Borosilicate glass is oven-safe to 500F and will not degrade chemically with repeated use or high heat. Inspect the Bundt for cracks or chips before use; damaged glass poses mechanical risk but not chemical hazard. Hand-wash only to preserve the glass integrity and avoid thermal shock from dishwashers. No special maintenance is needed; it will remain chemically inert indefinitely regardless of age or use frequency.
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 in glass formulation
Vintage Pyrex borosilicate glass has not been documented to contain lead; modern testing and historical records confirm lead-free formulations in bakeware of this era and type.
Thermal shock and breakage
Borosilicate glass resists thermal shock better than soda-lime glass but remains susceptible if exposed to extreme temperature differentials (e.g., hot oven to cold water). Mechanical failure risk, not chemical.
Coating degradation or peeling
Uncoated borosilicate glass has no surface treatment to degrade; interior and exterior remain chemically stable over time.
Silicate or mineral leaching
Borosilicate formulation is designed to be chemically inert; silicate leaching into food is not a documented concern even in vintage or heavily used glass cookware.
Non-stick coating fume risk
This product contains no non-stick coating, eliminating Teflon-type coating or other synthetic polymer fume hazards associated with overheating coated pans.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 95% 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.
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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.