Ziploc · Disposable Food Containers
Ziploc Rectangle Food Storage Containers 2 Pack
Lower PFAS concern; polypropylene food containers rarely require PFAS additives.
Ziploc Rectangle containers are standard polypropylene plastic with no reported PFAS treatment. Ziploc does not disclose PFAS status, but the material and intended use suggest lower risk than grease-resistant or non-stick products.
We flunk more products than we pass. This one earned its grade. How we grade
Material
polypropylene plastic containers and lids
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
Category baseline
food packaging is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
Ziploc Rectangle containers are polypropylene (PP, #5 plastic), a thermoplastic chosen for food storage because it is food-contact approved by the FDA and does not require BPA or BPS for structural integrity. Polypropylene has a melting point around 130°C (266°F), making it safe for cold and room-temperature storage and warm (not hot) foods. The lids likely contain the same material plus elastomer seals; no published reports document hazardous additives in standard Ziploc formulations.
The brand's record and disclosure
SC Johnson (Ziploc's parent company) has not publicly disclosed detailed polymer additive composition or commissioned independent testing of their food-storage containers for phthalates, BPA, or other migrants. The product carries FDA compliance claims but lacks third-party certification (e.g., GreenGuard, NSF). No product recalls or safety complaints specific to chemical leaching from Ziploc Rectangle containers appear in public databases or regulatory filings.
How it compares in its category
Polypropylene food containers are among the lowest-risk choices in the plastic storage category; they are less prone to leaching than polycarbonate or older PET formulations. Competing brands (Rubbermaid, OXO, Pyrex glass) offer equivalent or superior safety profiles, though Ziploc's pricing and snap-lid convenience make it a mainstream standard. Glass alternatives eliminate plastic leaching risk entirely but carry breakage hazards and higher cost.
If you buy it
Do not use Ziploc containers in the microwave or oven; polypropylene softens above 100°C and may release trace additives under heat stress. Avoid storing acidic foods (vinegar, tomato sauce, citrus) for extended periods, as acid can promote minor migration of processing aids. Replace containers if lids crack, become cloudy, or fail to seal properly. Hand-wash rather than dishwasher when possible to extend life and reduce thermal stress.
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 leaching
Polypropylene does not require BPA or BPS for structural function, and no published testing or recalls document these compounds in Ziploc containers. FDA-compliant formulations should not include these chemicals.
Phthalate plasticizers
Polypropylene base resin does not normally require phthalates, but seal elastomers or additives could theoretically contain trace amounts. No product-specific testing or complaint data is publicly available for Ziploc Rectangle containers.
Additive leaching under heat or acid stress
Polypropylene may contain slip agents, antioxidants, or UV stabilizers that could migrate in trace amounts if containers are exposed to temperatures above 70-80°C or prolonged contact with acidic or fatty foods. Risk is low under normal refrigerated storage but increases with misuse.
Microplastics shedding
Mechanical wear, repeated opening/closing of lids, and aggressive washing can fragment polypropylene over years of use. Risk is minor in normal food-storage use but accumulates with heavy use or rough handling.
Polymer degradation and cloudiness
Ziploc containers commonly develop cloudiness and brittleness after 1-3 years of use, particularly after repeated heating or dishwasher cycles. This is cosmetic and does not immediately pose a safety risk, but degraded containers should be replaced to prevent cracks and seal failure.
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.
More disposable food 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.