Waste Free Pantry · Food Storage Containers
Caraway Glass Airtight Container Set
Lower-concern airtight containers; glass is PFAS-safe, but plastic seal composition unspecified.
Caraway's glass containers carry lower PFAS risk because borosilicate glass is inherently PFAS-free and not a vector for fluorochemicals. The primary concern is the plastic clips and gasket seals, whose polymer type the brand does not publicly disclose.
Shop Waste Free Pantry on Amazon →Material
Borosilicate glass lids; plastic (unspecified polymer) clips/seals
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
The container body is borosilicate glass, a thermally stable, non-leaching material suitable for food storage across temperature ranges. The lids combine borosilicate glass tops with unspecified plastic clips and gasket seals. Borosilicate glass does not leach lead, cadmium, or BPA under normal kitchen use. The critical unknown is the polymer identity and manufacturing of the plastic seals, which typically experience the most contact stress and temperature cycling in airtight containers.
The brand's record and disclosure
Waste Free Pantry markets itself as an eco-conscious brand but provides no published material safety documentation, third-party certifications (such as FDA confirmation of food-contact compliance), or PFAS avoidance statements. The brand's silence on plastic seal composition is notable given the competitive transparency now standard among major food storage manufacturers. No public safety recalls or complaints are established for this product line.
How it compares in its category
Glass airtight containers occupy the safer tier of the food storage category, outperforming plastic-bodied alternatives in chemical stability. Competitors like Pyrex and OXO explicitly certify plastic components and publish material safety data. This product's lack of public disclosure places it in a middle-ground: glass body safety is clear, but seal materials lack the transparency now routine for premium brands in this segment.
If you buy it
Use only for room-temperature and refrigerated storage; do not place directly on heat sources or in ovens. Inspect plastic clips and gaskets every 6 to 12 months for discoloration, brittleness, or visible degradation, and replace if found. Hand wash rather than dishwasher to minimize thermal and chemical stress on seals. If the plastic seal develops odors or discoloration, discontinue use, as this may indicate leaching or material breakdown.
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.”
Plastic seal/clip polymer identity and leaching potential
The unspecified plastic components in the clips and gaskets are the primary exposure pathway. Without material identification (polypropylene, silicone, elastomer type), the risk of BPA, phthalates, or other plasticizers under temperature cycling cannot be ruled out, though food-contact use suggests some regulatory baseline was met.
Gasket degradation and food contact over time
Plastic gaskets in airtight containers experience repeated compression, moisture exposure, and temperature swings. Degradation can release microparticles or leachates, particularly if the polymer is lower-grade or unsuitable for repeated dishwashing.
Borosilicate glass thermal shock
Borosilicate glass is designed to resist thermal shock, but rapid temperature changes (e.g., refrigerator to oven) can cause cracking and create sharp glass fragments. This is a physical hazard rather than chemical contamination.
BPA or phthalate migration from undisclosed plastic seals
Airtight food storage containers with plastic gaskets may contain BPA or phthalate plasticizers. Warm foods or oily foods increase migration risk. The brand's lack of explicit BPA-free or phthalate-free certification leaves this unresolved.
Microplastics from seal wear
Repeated opening, closing, and dishwashing can generate microparticles from plastic clips and gaskets, introducing them into stored food. Risk is higher if seals are made from lower-durability polymers.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% 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.