Pyrex Totalseal · Food Storage Containers
Pyrex 7 Cup Round Storage Dish with Lid
Lower-concern choice; glass container avoids PFAS coating risks, but lid material warrants lid-replacement strategy for longevity.
Pyrex storage dishes are borosilicate glass, a material not known to contain PFAS coatings. The primary PFAS risk resides in the plastic or silicone lid seal. Pyrex makes no PFAS disclosure, but the glass body itself poses minimal concern; consider replacing the lid periodically or using glass lids as an abundance-of-caution move.
Shop Pyrex Totalseal on Amazon →Material
Borosilicate glass with silicone or plastic lid
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
The container itself is borosilicate glass, a chemically inert material that does not leach harmful substances into food even when heated or stored acidic foods. The lid is the variable: Pyrex Totalseal lids are typically silicone or polypropylene plastic. Silicone is generally non-reactive across temperature ranges and food types. Plastic lids carry a small but real risk of degradation, particularly if repeatedly microwaved or exposed to hot liquids, potentially introducing trace plasticizers into food over time.
The brand's record and disclosure
Pyrex (now owned by Instant Brands) has not published detailed material sourcing or chemical disclosure statements for Totalseal lids. The brand does not advertise BPA-free or phthalate-free claims on this specific line, which is notable in a category where such claims are standard marketing practice. No major recalls or controversies specific to this product line have been publicly documented. The silence on lid composition is a minor transparency gap in a category where competitors often provide explicit material breakdowns.
How it compares in its category
Borosilicate glass containers are among the safest options for food storage, free from BPA and phthalate leaching concerns that affect plastic-only alternatives. Pyrex Totalseal sits mid-market: glass body quality is high, but lids lack the explicitness of brands like OXO or Rubbermaid that market phthalate-free plastics. Glass-lid alternatives (e.g., Pyrex with tempered glass lids) eliminate lid-related degradation risk but cost significantly more. For the price point, this product offers a reasonable safety-to-cost ratio.
If you buy it
Store non-acidic and mild foods directly in the glass; acidic foods (tomato-based, citrus, vinegar) can be stored but rotate the container every 6-12 months. Never heat food in the container in a conventional oven above 425F (glass limit depends on thermal shock). Do not place the plastic/silicone lid in the dishwasher if possible; hand-wash to extend lid life. Plan to replace the lid every 2-3 years or if it becomes sticky, discolored, or emits an odor when heated.
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.”
Plasticizer leaching from polypropylene lid (if plastic type)
If the lid is polypropylene rather than silicone, repeated heating or contact with fatty/acidic foods may gradually leach trace phthalates or bisphenols. Pyrex does not specify lid polymer type on packaging, making this difficult to verify pre-purchase.
Silicone lid degradation and off-gassing
If the lid is silicone, prolonged exposure to oils, heat above 350F, or dishwasher cycles can degrade the material and release trace siloxane compounds. This is a slow process and health risk is low, but older lids may develop odor or taste transfer.
Borosilicate glass thermal shock fracture
Pyrex borosilicate glass is engineered to resist thermal shock, but rapid temperature changes (e.g., hot stove to cold water) can cause sudden breakage. This is a physical safety hazard, not a chemical one, but worth noting for kitchen safety.
BPA or phthalates in lid (unconfirmed due to lack of disclosure)
No recalls or test reports have identified BPA or phthalates in Pyrex Totalseal lids. However, the brand's refusal to explicitly state lid composition on packaging leaves uncertainty. Competitor disclosure is more transparent in this category.
Microplastics from lid wear into stored food
Over years of use, plastic or silicone lids may shed tiny particles into food, especially if stored foods are acidic or oily. This is a slow, low-level risk mitigated by regular lid replacement.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 82% 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.