OXO · Food Storage Containers
OXO Good Grips 1.6 Cup Smart Seal Glass Rectangle Container
Lower-concern choice; glass container avoids known PFAS-prone coatings, though silicone seal not explicitly verified.
OXO's Smart Seal container is built from borosilicate glass, which carries no known PFAS risk. The lid features a silicone gasket seal, a material not typically associated with PFAS, though OXO makes no public PFAS claim either way.
Shop OXO on Amazon →Material
borosilicate glass with silicone gasket lid seal
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 container is borosilicate glass, a chemically inert, heat-resistant material that does not leach into food under normal storage or reheating conditions. The lid seal uses silicone rubber, which is also food-safe and does not degrade or migrate into food at typical kitchen temperatures. Borosilicate glass is inherently safer than polycarbonate or other plastics because it has no polymer binders or coatings that can break down over time. Glass containers are reusable indefinitely without degradation of the material itself.
The brand's record and disclosure
OXO is a privately held housewares manufacturer with no significant public safety controversies or regulatory actions on record for food storage products. The company does not publish detailed material transparency or third-party certifications (e.g., BPA-free claims) on this specific product, though borosilicate glass is inherently free of BPA and similar endocrine disruptors. OXO has not faced major recalls tied to leaching or material failure in glass container lines. Disclosure practices are minimal but baseline safety is implied by material choice.
How it compares in its category
Glass containers like this are the safest category choice for food storage because they eliminate plastic leaching risks entirely. Most plastic alternatives (polycarbonate, polypropylene, or tritan) carry some risk of BPA, BPS, or phthalate migration, especially when heated or used repeatedly. Stainless steel containers are also safe but lack transparency for viewing food contents. This OXO product sits at the top tier of material safety for the food storage category.
If you buy it
Borosilicate glass can withstand oven and microwave use safely; the silicone gasket is rated to approximately 400°F, so remove the lid before very high-heat cooking. Wash the silicone seal by hand or on the top rack of the dishwasher to extend its life; degraded seals lose airtightness but pose no toxicity risk. Replace the gasket if it becomes permanently discolored, cracked, or no longer seals; OXO sells replacement lid sets. Glass is dishwasher-safe and does not absorb odors or stains.
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.”
Silicone gasket degradation
Extended exposure to heat, oils, or dishwasher cycles may cause the silicone seal to harden, discolor, or lose elasticity over years of use. This affects airtightness and food freshness, not toxicity, but replacement is simple and inexpensive.
Glass breakage and sharp edges
Borosilicate glass is more durable than standard glass but is not unbreakable. Impact on hard surfaces or thermal shock (rapid temperature change) can cause fracture. This is a mechanical hazard, not a chemical one, but sharp fragments are a risk if broken.
BPA/BPS or phthalate leaching
Borosilicate glass containers do not contain polycarbonate or vinyl-based polymers and therefore pose no credible risk of BPA, BPS, or phthalate migration. This is a strength of the glass material choice.
Heavy metals in glass or lid hardware
Borosilicate glass does not contain lead, cadmium, or other heavy metals in its formulation. The plastic lid components and any metal fasteners are not documented to exceed food-contact safety limits, and no recalls have been issued.
Microplastic shedding
Glass does not shed microplastics. The silicone gasket may theoretically degrade into particles with extreme age or damage, but no evidence of this at normal use is on record, and any wear would be mechanical rather than chemical.
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.