Airtight · Food Storage Containers
Caraway Food Storage Set
Lower concern glass storage, PFAS risk primarily in plastic lids; verify lid material specifics.
Caraway's glass food storage uses borosilicate glass, a lower-PFAS-risk material. The main uncertainty is the plastic lids, the brand claims PFAS-free status, but public disclosures don't specify lid resin type or confirm third-party testing. No government recalls or detected PFAS have been reported for this product line.
Brand says: “Caraway states their food storage containers are made with borosilicate glass and are PFAS-free.”
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Borosilicate glass containers with plastic lids
Brand disclosure
Brand claims PFAS-free
Lab data
No public lab test
Why this grade
Category baseline
food packaging is a category where PFAS exposure is more common.
Brand-stated PFAS-free
The brand states the product is PFAS-free (self-declared).
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 Food Storage containers use borosilicate glass bodies, a chemically inert material that does not leach chemicals into food under normal storage or gentle heating. The lids are plastic, likely polypropylene (PP) or similar, which present the main chemical exposure pathway in this product. Borosilicate glass is resistant to thermal shock and does not degrade into microparticles the way some ceramic coatings or lower-grade glass can over time. The critical question is whether the plastic lids contain BPA, phthalates, or other plasticizers; this depends on the exact resin formulation.
The brand's record and disclosure
Caraway (the broader home goods brand) has made explicit PFAS-free claims for their cookware line and general product positioning around non-toxic materials. Specific detailed material disclosure for this food storage set's lid composition is not widely documented in public sources; the brand does not appear to have published a formal chemical inventory or third-party testing certificates for these containers. No recalls or safety controversies specific to this product have been recorded. The brand's PFAS stance is credible but transparency on other plastic additives remains limited.
How it compares in its category
Glass food storage containers are among the lowest-risk options in the category, superior to single-use plastics or older ceramics that may contain lead glazes. Most borosilicate glass competitors (Pyrex, OXO, Rubbermaid Brilliance) use similar construction; the differentiator is lid material and whether snap seals contain recyclable or problematic plastics. Caraway's positioning as a premium, health-conscious brand places it in the same tier as Pyrex and Rubbermaid in terms of chemical safety, though marketing emphasis differs. Price is typically higher than mass-market alternatives but justified by durability.
If you buy it
Borosilicate glass is safe for microwave, oven (up to typical limits around 350 F, check product spec), and dishwasher use. Do not subject containers to rapid temperature changes (e.g., hot oven to cold water) as this can cause cracking. Inspect plastic lids regularly for cloudiness, cracks, or discoloration, signs of degradation, and replace if visible wear occurs. Store away from direct sunlight and extreme heat to slow any long-term plastic lid aging; do not use lids during heating or high-temperature storage (transfer contents to glass-only if microwaving).
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 and phthalates in plastic lids
The PP or other plastic lid material may contain BPA or phthalate plasticizers depending on manufacturing date and supplier. Caraway has not published detailed lid resin specs; risk is low if food is stored at room temperature but increases if hot food is covered or microwave heating occurs with lids sealed. Direct contact with hot liquids should be avoided.
Microplastics from lid degradation
Over years of use, plastic lids may develop micro-cracks or surface wear that could shed small plastic particles into stored food. This is a long-term concern; containers maintained in good condition (no visible cracking or cloudiness) present minimal acute risk. Replacing lids every 2-3 years of frequent use is a reasonable precaution.
Borosilicate glass thermal shock or breakage
Borosilicate glass is designed to resist thermal shock better than soda-lime glass, and no safety recalls or widespread breakage reports exist for this product line. Proper use (avoiding rapid temperature swings) prevents this risk.
Lid seal integrity and bacterial growth
If airtight seals are functional and containers are cleaned and dried properly before storage, bacterial or mold growth risk is minimal. Risk increases only if seals fail or lids are stored wet; this is a maintenance issue, not a manufacturing defect specific to Caraway.
Heavy metals in borosilicate glass
Borosilicate glass formulations used in food storage are not a known source of lead or cadmium leaching. No public testing or recalls indicate contamination in this product category from Caraway or competitors.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% 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.
Formulations and coatings change between production runs. Always check the current label before buying.
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.