Pyrex · Cookie Sheets
Pyrex Glass Baking Tray
Buy with confidence, glass baking trays pose no PFAS risk.
Pyrex glass baking trays are made from borosilicate glass with no non-stick coating, Teflon-family coating layer, or water-resistant treatment. Glass is an inert material that does not require PFAS-based additives. No PFAS concern applies to this product category.
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
Pyrex baking trays are made from borosilicate glass, a silica-based formulation engineered to withstand thermal shock and repeated heating without cracking or leaching contaminants. Unlike ceramic or enameled cookware, borosilicate glass has no surface coating that can degrade, chip, or release lead, cadmium, or other heavy metals into food. The material is chemically inert across normal baking temperatures (up to 500°F for most Pyrex products), meaning nothing migrates from the glass into your food under standard use.
The brand's record and disclosure
Pyrex (now owned by Instant Brands) has maintained a long track record of transparency about cookware safety and does not use Teflon-type coating, PFOA, or known PFAS coatings on its glass products. The brand has not faced major recalls for leaching or coating failure on glass baking trays in recent decades. While Pyrex does not proactively advertise PFAS avoidance (the company's stance is silent on the issue), this is not a concern for uncoated glass, the material itself is inherently PFAS-free by chemistry, not by choice.
How it compares in its category
Borosilicate glass baking trays are among the safest materials in the baking category, outperforming ceramic-coated steel (risk of glaze lead), aluminum (potential for acidic leaching), and non-stick ceramics (coating can degrade). They are comparable in safety to stainless steel but with the advantage of no metal ion leaching and full visibility of food during baking. The main trade-off is breakage risk and weight; glass requires gentler handling than metal alternatives.
If you buy it
Pyrex glass baking trays are safe for ovens up to 500°F; verify the specific product's temperature limit on the label. Avoid rapid temperature changes (e.g., moving directly from oven to cold countertop), which can cause thermal shock and cracking, allow gradual cooling. Hand wash when possible to extend the lifespan of any printed markings; most Pyrex glass is dishwasher-safe but labels may fade. Replace if the glass becomes visibly damaged or cloudy from repeated thermal stress, though the material itself does not degrade chemically.
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 can shatter if exposed to rapid temperature swings. This is a mechanical hazard, not a chemical leaching risk, and is managed through proper care (gradual cooling, avoiding direct contact with cold surfaces immediately after use).
Lead in printed markings or labels
No recalls or reports of lead in Pyrex glass baking tray markings or labels. However, some vintage Pyrex pieces (pre-1980s) used lead-based pigments; modern Pyrex products are not known to have this issue.
Cadmium in enamel or glaze
Pyrex glass baking trays have no enamel or ceramic coating, eliminating cadmium risk entirely. This hazard applies only to coated or decorated ceramic bakeware, not uncoated borosilicate glass.
Aluminum leaching
Glass is chemically inert and does not leach aluminum or other metals. This hazard is specific to bare aluminum or unlined aluminum baking sheets, not glass.
Microplastics or polymer degradation
Glass baking trays contain no plastic components in the cooking surface. Some Pyrex products may have plastic handles or lids (on covered bakeware), but these do not contact food directly during baking.
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 Cookie Sheets
GreenPan
GreenLife Ceramic Nonstick Cookie Sheet
Ceramic nonstick coating
Lower concern: ceramic nonstick cookware with public PFAS-free positioning, though no independent lab verification.
⚠Risky category by default
GreenPan
Premiere Ovenware Ceramic Nonstick Half Sheet Baking Pan
Ceramic nonstick coating
Lower-concern nonstick option; ceramic coating replaces Teflon-family coating, though independent PFAS testing of this specific product is limited.
⚠Risky category by default
GreenPan
GreenLife Ceramic Nonstick Cookie Sheet
ceramic nonstick coating
Lower-concern nonstick option; ceramic coating avoids known Teflon-family coating, but independent PFAS testing is limited.
⚠Risky category by default
More cookie sheets 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.