Pyrex No-Leak Glass · Food Storage Containers
PYREX 18-Piece Clear Glass Food Storage Container Set
Buy. Glass food storage has negligible PFAS risk.
Pyrex glass storage containers are made from borosilicate glass and plastic lids, neither is a typical PFAS source. Glass itself does not require water or grease resistance treatments. No public PFAS disclosures or concerns exist for this product category, and the brand offers no claims either way.
Shop Pyrex No-Leak Glass on Amazon →Material
borosilicate glass, polypropylene lids
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
food packaging 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 set uses borosilicate glass, a thermal-shock-resistant formulation with silica and boron oxide that does not leach into food under normal storage conditions. The lids are polypropylene (PP #5), a relatively inert thermoplastic that resists degradation at room temperature and typical refrigerator use. Borosilicate glass avoids the lead or cadmium contamination risks associated with some ceramic or enameled cookware because it is non-porous and chemically stable.
The brand's record and disclosure
Pyrex (owned by Instant Brands) does not publish detailed chemical disclosures or third-party safety certifications for this specific product line. The brand has not faced major recalls or contamination scandals related to glass food storage in recent years. However, the company's silence on PFAS use in lid manufacturing or processing is typical of the category and does not indicate problems, only lack of transparency.
How it compares in its category
Glass food storage containers are among the safest options in the market because glass is chemically inert and does not off-gas or leach under normal conditions. This Pyrex set is competitive with Rubbermaid, OXO, and store-brand borosilicate alternatives. The main differentiation is durability and opacity over time; Pyrex's borosilicate formulation resists cloudiness better than cheaper soda-lime glass alternatives.
If you buy it
Store food at room temperature or refrigerated; do not use lids in the oven or microwave (remove them first). Hand-wash lids rather than dishwasher when possible to extend their lifespan, as prolonged heat cycles can degrade polypropylene seals. Replace lids if they crack, warp, or no longer seal properly. Glass containers themselves are essentially permanent and will not degrade, making this a durable long-term investment.
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.”
Polypropylene lid degradation and seal failure
PP lids may warp or lose seal integrity after repeated dishwasher cycles or exposure to high heat; degraded lids reduce food containment but do not introduce chemical hazards if lid itself is not consumed.
Thermal shock breakage
Although borosilicate is thermal-shock-resistant, containers can fracture if moved from freezer directly to hot surfaces or filled with boiling liquid without gradual warming; broken glass is a physical hazard, not a chemical one.
Microplastics from polypropylene lids
No published evidence that intact PP lids shed microplastics into stored food at room temperature; risk is theoretical and associated with damage, grinding, or extreme wear rather than normal use.
BPA or bisphenol alternatives in polypropylene
Polypropylene (#5) does not inherently contain BPA; no established reports of BPA or BPS leaching from Pyrex PP lids under normal storage conditions, though manufacturer does not disclose mold-release agents or processing aids.
Lead or cadmium in glass formulation
Borosilicate glass used in food storage does not require lead or cadmium for function; Pyrex's formulation has no documented contamination history in this product category.
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 Food Storage Containers
Caraway
Food Storage Set
Glass containers with plastic lids
Lower concern; glass + plastic lids with stated PFAS-free position, but no third-party verification of lid material.
⚠Risky category by default
Caraway
Home 9-Piece Mini Food Storage Set
Borosilicate glass containers with plastic lids
Lower-concern option; glass containers avoid PFAS coatings, but verify lid material before purchase.
⚠Risky category by default
Caraway
Cream 6.6-Cup Non-Stick Glass Food Storage Container with Lid
borosilicate glass with non-PFAS lid
Lower PFAS concern, glass container with stated non-PFAS lid, though third-party verification absent.
⚠Risky category by default
More food storage containers 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.