Ziploc · Food Storage Containers
Ziploc Endurables Medium Container
Lower concern, plain PP food containers rarely require PFAS, but Ziploc offers no public commitment.
Ziploc Endurables is a polypropylene food storage container with no coating or water-resistance treatment typical of PFAS use. Ziploc has made no public PFAS disclosure or claims for this product. No third-party PFAS testing or certifications are publicly available, and the brand remains silent on the topic.
Shop Ziploc on Amazon →Material
Polypropylene (PP) plastic container
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.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Ziploc Endurables are polypropylene (PP), a thermoplastic with a melting point around 130°C. PP is inherently BPA/BPS-free and does not contain phthalate plasticizers by design; it relies on the polymer backbone itself for rigidity. At typical food storage temperatures (room temperature to refrigeration), PP is chemically inert and does not leach monomers or additives into food under normal use. This material class is considered one of the safer food-contact plastics by regulatory agencies including FDA and EFSA.
The brand's record and disclosure
Ziploc (a SC Johnson brand) provides no public transparency on PFAS use in their food storage lines, nor do they offer third-party certifications (e.g., GreenGuard, NSF). SC Johnson has faced no substantiated recalls or contamination incidents specific to Endurables containers. The company does not prominently disclose material sourcing or chemical additive inventories, which is typical for mainstream food-storage brands but leaves independent verification difficult.
How it compares in its category
Ziploc Endurables sit in the mainstream reusable food-storage segment alongside OXO, Rubbermaid, and store brands. Most PP-based containers in this price range share identical chemical risk profiles. Glass alternatives (Pyrex, Rubbermaid Brilliance) eliminate plastic leaching risks entirely but cost 2-3x more and risk breakage. Ziploc does not stand out as safer or riskier than competitors at the same tier.
If you buy it
Use only for cold or room-temperature storage; do not microwave or fill with hot liquids above 60°C, as heat can accelerate any minor additive migration. Hand-wash rather than dishwasher to extend seal integrity and reduce thermal stress. Replace containers if seals crack, clouding intensifies, or odors persist after washing (signs of degradation). Store away from sunlight and solvents (alcohol, oils) to preserve polymer stability over years of use.
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 and phthalates
Polypropylene does not require BPA or phthalate plasticizers for its formulation. No public reports or FDA findings of these chemicals in Ziploc PP containers.
Microplastic shedding from coating or degradation
PP itself does not fragment at room temperature, but seals, hinges, and latch mechanisms may degrade over years, potentially releasing microparticles into stored food. Risk increases with age, thermal cycling, and mechanical stress.
Additive migration (heat-triggered)
PP containers often contain slip agents, antistatic additives, or stabilizers to aid manufacturing. Migration into food is negligible at room temperature but increases significantly above 60°C; microwave use is the primary risk factor.
Odor absorption and persistent off-flavors
PP is nonpolar and absorbs strong odors (garlic, curry, turmeric) that can persist and transfer to new foods. This is a quality-of-life issue rather than a safety hazard but indicates active polymer-food interaction.
Seal degradation and bacterial growth
Ziploc Endurables rely on plastic seals that weaken with repeated use and temperature exposure. Compromised seals can trap moisture and allow bacterial colonization; no manufacturer data on seal lifespan is publicly available.
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.
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.