Caraway · Food Storage Containers
Caraway 6.6-Cup Glass Food Storage Container
Lower-concern food storage, glass and silicone carry minimal PFAS risk; no synthetic coatings or water-resistance treatments.
Caraway's glass food container is made from borosilicate glass with silicone gasket seals, neither of which typically require PFAS-based coatings or water repellents. Glass and food-grade silicone are foundational safe materials for food contact.
Shop Caraway on Amazon →Material
borosilicate glass with 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.
The full breakdown
What it's made of and why it matters
This container uses borosilicate glass, a chemically inert material that does not leach into food under normal storage conditions. The seals are silicone rubber, which is also food-contact safe and does not degrade or release compounds into stored items over time. Unlike tempered soda-lime glass or ceramic with glazes, borosilicate has no lead or cadmium risk in its composition. Glass does not absorb odors or stains, making it one of the safest long-term food storage materials available.
The brand's record and disclosure
Caraway is a direct-to-consumer cookware and food storage brand known for marketing sustainability and non-toxic product lines. The company does not publicly disclose PFAS testing or certification for this product, though the material composition (glass and silicone) inherently avoids PFAS-treated coatings. No product recalls, legal actions, or safety controversies have been documented for Caraway food storage containers. The brand's silence on PFAS testing is not unusual for glass products, which typically do not require such treatment.
How it compares in its category
Borosilicate glass containers are considered the gold standard for food storage safety compared to plastic alternatives that may leach BPA, BPS, or phthalates, or ceramics that risk lead in glazes. Silicone seals are preferable to older PVC or cheaper rubber compounds that may off-gas VOCs. This product sits in the premium-safety tier of the category, similar to Pyrex or Anchor Hocking borosilicate options, with equivalent chemical safety but often at a higher price point. The main trade-off is weight and breakage risk versus plastic convenience.
If you buy it
Borosilicate glass is oven and dishwasher safe up to typical thermal limits (usually 500F); confirm the silicone seal manufacturer specs for maximum heat. Inspect seals annually for cracks, discoloration, or loss of elasticity, as silicone does degrade over 3-5 years of heavy use; replacement seals are often available separately. Hand-wash seals if dishwashing to extend life. Store away from direct thermal shock (e.g., cold fridge to hot oven immediately) to prevent thermal stress cracking, though borosilicate is more resistant than standard glass.
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 heat-resistant but not immune to rapid temperature changes. Dropping or impact damage poses a fracture risk, which could introduce sharp glass fragments into food or cause injury during handling.
Silicone seal degradation
Silicone rubber seals can degrade, harden, or lose elasticity over 3-5 years, reducing airtight integrity and potentially allowing mold or bacterial growth in stored food if seals fail. Regular inspection is recommended.
BPA or chemical leaching from seals
Food-grade silicone seals used in borosilicate containers do not typically leach BPA, phthalates, or other endocrine disruptors under normal storage conditions. No documented issues reported for Caraway products.
Lead or cadmium in glass
Borosilicate glass does not contain lead or cadmium in its formulation. This hazard is relevant only to glazed ceramics or certain decorative glass; it does not apply to this product.
Microplastic generation
Glass is inert and does not shed microplastics. Silicone seals may theoretically degrade over extended time, but this product is not a known source of microplastic contamination in stored food.
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.