Pyrex Totalseal · Food Storage Containers
Pyrex Ultimate 10-Piece Glass Food Storage Set
Lower PFAS concern, glass storage is an inherently safer material class with no known PFAS triggers.
Pyrex Ultimate is primarily borosilicate glass with plastic lids and silicone gaskets. Glass itself does not require PFAS-based coatings or water repellents. No public disclosure from Pyrex/Totalseal on PFAS testing or claims, but the material composition presents lower risk than nonstick cookware or treated textiles.
Shop Pyrex Totalseal on Amazon →Material
borosilicate glass lids, plastic (BPA-free) and silicone seals
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Uncoated safe material
Bare, uncoated material (cast iron, stainless, carbon steel, or glass) with no surface treatment to contain PFAS.
Category baseline
food packaging is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
This set uses borosilicate glass for containers, which is chemically inert and does not leach into food under normal storage or mild heating. The lids combine BPA-free plastic (likely polypropylene or similar) with silicone gaskets for sealing. Borosilicate glass is specifically engineered to resist thermal shock and chemical attack, making it one of the safest food contact materials available. The absence of ceramic glazes or coatings eliminates concerns about lead or cadmium migration.
The brand's record and disclosure
Pyrex is owned by Instant Brands and has a long history as a laboratory-grade glass manufacturer, lending credibility to material safety. The company does not publicly emphasize PFAS avoidance in marketing, though borosilicate glass inherently avoids PFAS-laden coatings. No major product recalls or leaching incidents specific to this line have been publicly documented. Pyrex containers are not certified organic or BPA-free labeled by third parties, but BPA-free claims on packaging are consistent with industry standards for polypropylene-based lids.
How it compares in its category
Glass food storage is among the safest options available, outperforming plastic-only containers and competing favorably with stainless steel on chemical inertness. Unlike ceramic or stoneware containers, this product eliminates glaze-related heavy metal risk. Compared to silicone-only alternatives, the glass core provides better resistance to staining and odor absorption. The BPA-free plastic components align with mainstream expectations but offer no certification advantage over generic competitor products.
If you buy it
Avoid placing lids directly on stovetops or in ovens; use containers for cold storage or microwave reheating only (remove lid first if heating). Inspect silicone gaskets annually for visible cracking or discoloration, which signals replacement need. Hand wash lids and gaskets separately from the glass to extend seal lifespan. Do not expose to extreme thermal shock (e.g., hot container to freezer); allow gradual temperature changes to prevent glass fracture.
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.”
Plastic lid degradation and microplastics
Polypropylene lids can degrade with repeated heat cycling or dishwasher use. While no specific recalls exist for this product, older or damaged lids may shed microparticles into stored food, particularly if contents are reheated inside the container.
Silicone gasket leaching
Food-grade silicone is generally considered safe at storage temperatures. No documented leaching of harmful compounds from Pyrex Totalseal silicone gaskets has been reported, and silicone does not contain BPA or plasticizers by design.
Glass thermal stress fracture
Although borosilicate glass is thermal-shock resistant, rapid temperature changes (e.g., hot dishwasher to cold countertop) or impact can cause hidden microfractures that eventually fail. This is a physical safety hazard rather than chemical, but increases microplastic risk if plastic lid fragments enter food.
Bacterial growth in compromised seals
If silicone gaskets crack or lids lose their seal integrity, bacteria can proliferate in stored food without visible spoilage. This is a food safety concern rather than a chemical hazard, but emphasizes the need for regular inspection and prompt replacement of worn components.
Lead or cadmium in borosilicate glass
Laboratory-grade borosilicate glass does not contain intentional lead or cadmium. Pyrex's long history in scientific applications and lack of reported heavy metal contamination make this a negligible risk for this product line.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 85% 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 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.