Caraway · Food Storage Containers
Caraway Food Storage Set
Lower concern; glass + plastic lids with stated PFAS-free position, but no third-party verification of lid material.
Caraway's food storage set uses glass containers, a lower-risk substrate, and the brand claims PFAS-free manufacturing. However, plastic lids are the weak point; the brand does not disclose the specific polymer or provide third-party lab testing to confirm the lid material is PFAS-free. No independent certification exists.
Brand says: “Caraway states their food storage containers are made with glass and does not use PFAS in their products.”
Shop Caraway on Amazon →Material
Glass containers with plastic lids
Brand disclosure
Brand claims PFAS-free
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.
Brand-stated PFAS-free
The brand states the product is PFAS-free (self-declared).
The full breakdown
What it's made of and why it matters
Caraway Food Storage Set uses borosilicate glass for containers, which is chemically inert and does not leach into food under normal use or heating. The plastic lids are the relevant component: Caraway explicitly markets these as PFAS-free, though they have not published third-party testing or material certifications (e.g., no BPA-free verification statement visible in standard product literature). Borosilicate glass is considered one of the safest food-contact materials available and resists thermal shock and degradation.
The brand's record and disclosure
Caraway has built its brand reputation on health-conscious, toxin-free positioning and explicitly advertises PFAS-free cookware and storage products. The company has not published detailed chemical composition sheets or third-party certifications (NSF, BPA-free certification, or similar) for the lid material in publicly available sources, which limits independent verification. No significant safety recalls or contamination incidents have been publicly documented for this product line. The brand's transparency is marketing-forward rather than technical-detailed.
How it compares in its category
Glass-and-plastic-lid storage sets are a middle ground: glass is superior to polycarbonate or acrylic for food safety, but plastic lids introduce a potential weak point. Compared to all-glass systems (e.g., Pyrex with glass lids) or stainless steel containers, Caraway's plastic lids represent a minor trade-off for convenience and cost. Most mainstream alternatives (Rubbermaid, Sistema, OXO) do not explicitly market PFAS-free status, making Caraway's claim a market differentiator, though industry-wide PFAS contamination in food-storage plastic remains uncommon at typical use levels.
If you buy it
Hand wash lids rather than dishwasher to extend plastic life and reduce leaching risk from heat exposure. Do not microwave food directly in the plastic lids, and avoid leaving acidic or oily foods in contact with lids for extended periods (weeks), as plastic can gradually absorb compounds. Replace lids if they become visibly scratched, discolored, or odorous, which signals material degradation. Store in a cool, dark place to minimize plastic photodegradation and off-gassing.
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/BPS in plastic lid material
Caraway explicitly markets PFAS-free lids, and no independent testing has documented BPA or BPS in this product. However, the company has not published a formal BPA-free certification or chemical composition list for the lid plastic, so absolute absence cannot be confirmed.
Phthalates in plastic lids
Plastic lids may contain phthalate plasticizers if made from vinyl or certain flexible polymers; Caraway does not explicitly disclose whether phthalates are absent. Most modern food-storage plastics use alternatives, but independent verification is lacking.
Microplastics migration from lid degradation
If plastic lids are scratched, heated repeatedly, or exposed to aggressive cleaning agents, microscopic fragments could theoretically enter stored food. Hand washing and gentle handling minimize this risk.
Borosilicate glass breakage and thermal shock
Borosilicate glass is engineered to resist breakage, but sudden temperature extremes (e.g., freezer to stovetop) can still cause cracking. This is a physical, not chemical, hazard and is normal for this material class.
Plastic lid odor or off-gassing at high temperatures
Plastic lids may release volatile organic compounds or absorb food odors if exposed to heat above their design threshold (typically 60-80°C). Caraway does not specify the exact resin type or temperature rating for lids.
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.