Caraway · Food Storage Containers
Caraway Glass Airtight Container Set
Lower PFAS concern, glass containers pose minimal fluorochemical risk; no lids/seals data available.
Caraway's glass airtight containers are made from borosilicate glass, a chemically inert material with no established PFAS risk. However, the brand does not disclose details about lid materials (typically plastic polymers or silicone) or any seals/coatings, leaving a small data gap.
Shop Caraway on Amazon →Material
borosilicate glass lids and glass containers
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
Caraway's containers are borosilicate glass, a silicate-based material engineered for thermal stability and resistance to chemical leaching. Borosilicate is chemically inert when in contact with food and does not release BPA, phthalates, or other endocrine disruptors that plague conventional plastics. The glass lids appear to use glass as well, though Caraway has not publicly disclosed seal or gasket material composition (silicone, rubber, or other polymers may be present in closure mechanisms).
The brand's record and disclosure
Caraway markets itself as a safety-focused cookware and food storage brand with emphasis on non-toxic materials, but has published no third-party certifications (NSF, FDA compliance statements, or independent safety testing) for this container line. The brand remains silent on PFAS in seals or closures and has not issued detailed material safety data sheets. No recalls or safety complaints have been documented for this specific product line in public databases.
How it compares in its category
Borosilicate glass containers rank among the safest food storage options available, superior to BPA-containing polycarbonate and plastics prone to leaching when heated. They compare favorably to stainless steel containers (which carry no leaching concerns but higher cost and opacity) and ceramic storage (which may have lead/cadmium in glazes if unvetted). Caraway's pricing sits at the premium end but reflects material quality; equivalent borosilicate sets from OXO or Pyrex offer similar safety profiles at lower cost.
If you buy it
Use containers within borosilicate's temperature limits (generally safe to 400°F or 204°C; check product specs for exact range). Do not subject cold glass to sudden heat or vice versa to prevent thermal shock and cracking. Inspect seals and lids regularly for wear or cloudiness; replace gaskets if they degrade or show permanent deformation. Wash lids and closure mechanisms by hand to preserve seal integrity; dishwasher use may shorten the lifespan of rubber or silicone components.
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.”
BPA / Phthalates in Food Contact
Borosilicate glass is inherently free of BPA and phthalates. No evidence that Caraway glass containers leach these compounds.
Microplastics from Heating
Glass does not degrade into microplastics when heated. This hazard applies only to plastic-based containers and does not affect glass products.
Seal/Gasket Material Leaching (Unspecified)
Caraway has not disclosed the material composition of lids, seals, or gaskets. If these contain silicone, rubber, or other polymers, low-level migration is possible under prolonged storage of acidic or fatty foods, though risk is generally minimal.
Lead / Cadmium in Glazes or Coatings
Borosilicate glass is not glazed; it is formed glass itself and does not require enamel or ceramic coatings. No lead or cadmium hazard is inherent to this material.
Thermal Shock / Glass Breakage
While not a chemical hazard, borosilicate glass can crack under rapid temperature changes. This is a mechanical failure mode, not toxicity, but creates sharp edges and loss of seal integrity on containers.
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.