Pyrex · Bundt Pans
Vintage Pyrex 25cm France Bundt Pan Cake Ring 10" Jello Mold Clear
Lower concern; vintage borosilicate glass Bundt pan has no nonstick coating or known PFAS treatments.
Vintage Pyrex bakeware made from borosilicate glass contains no Teflon-type coating nonstick coating or Teflon-family coating layers commonly associated with PFAS. Glass is an inert, chemically stable material with no documented PFAS content in standard formulations.
Shop Pyrex on Amazon →Material
Borosilicate glass (clear)
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.
No PFAS disclosure
No public statement about PFAS in this product.
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 pan is borosilicate glass, a heat-resistant formulation engineered to withstand thermal shock and oven temperatures without leaching or breaking easily. Borosilicate glass contains silica and boron oxide, which create a stable, non-porous surface that does not interact chemically with food or acidic ingredients. Unlike soda-lime glass, borosilicate resists thermal stress from rapid temperature changes (e.g., moving from freezer to oven). This material has been in continuous safe use for over a century with no established toxicological concerns.
The brand's record and disclosure
Pyrex (now owned by World Kitchen LLC) has a long history as a trusted glass cookware manufacturer with no major product recalls linked to the glass itself or coating hazards in vintage borosilicate lines. The company does not publicly disclose PFAS testing or certification for this product category, which is typical for glass items that do not use nonstick treatments. Vintage Pyrex pieces from the mid-20th century onward maintain the same borosilicate formulation and are widely regarded as durable and safe by consumer groups.
How it compares in its category
Glass Bundt pans are among the safest baking vessels because they avoid coated-metal hazards (Teflon-type coating/PFOA fumes, aluminum leaching) and plastic concerns altogether. Compared to ceramic or stoneware molds, borosilicate glass is non-porous and does not absorb flavors or bacteria over time. Vintage Pyrex glass also tends to be thicker and more durable than modern equivalents, making it less prone to chipping or breakage during long-term use.
If you buy it
Hand-wash gently to avoid thermal shock; do not move directly from freezer to a preheated oven. Inspect for chips or cracks before each use, as damaged glass can shed sharp fragments into food. Borosilicate glass is safe for oven temperatures up to 500F (check your specific model; most vintage Pyrex is rated 350-425F). Store in a secure location away from hard impacts, as older glass may be more brittle than advertised due to age and previous thermal stress.
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 cracking
Vintage borosilicate glass is durable but may be more prone to cracking if subjected to rapid temperature swings; confirm maximum oven temperature rating for this specific pan before use.
Glass fragmentation from damage
Chipped or cracked glass Bundt pans can shed sharp fragments into baked goods; inspect thoroughly before use and replace if any damage is visible.
Lead or cadmium in vintage glazes or labels
Vintage Pyrex borosilicate glass itself does not contain lead or cadmium; no recalls or test data suggest contamination in the glass formulation from this era.
Coating degradation or nonstick fume risk
This clear borosilicate glass pan has no nonstick coating, eliminating Teflon-type coating or PFOA fume concerns; the glass surface does not degrade or release harmful fumes under normal cooking.
Chemical leaching from glass
Borosilicate glass is chemically inert and does not leach into food or acidic liquids under standard baking conditions; no established migration pathway to food.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 88% 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.