Ziploc · Disposable Food Containers
Ziploc Mini Rectangle Food Storage Containers
Lower concern. Polypropylene containers unlikely to contain PFAS unless treated.
Ziploc Mini Rectangles are polypropylene plastic with no disclosed water-resistant or grease-resistant coatings. No brand PFAS disclosure, but base material and typical use profile suggest lower PFAS risk than treated storage containers.
We flunk more products than we pass. This one earned its grade. How we grade
Material
polypropylene plastic, no intentional water/grease treatment disclosed
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 Mini Rectangle containers are injection-molded polypropylene (PP, #5 plastic), a thermoplastic chosen for food contact because it resists chemical attack better than lower-number plastics and has a higher melting point (~160°C / 320°F). Polypropylene does not intentionally incorporate BPA, BPS, or phthalates in food-contact grades; the polymer backbone itself is considered inert at room temperature and during normal refrigeration. No water or grease-resistant coating is disclosed on this product line, meaning the plastic surface is unmodified and lower-risk for hidden additives.
The brand's record and disclosure
SC Johnson (Ziploc parent company) does not publicly commit to PFAS-free labeling on food storage lines and maintains general transparency on polymer resin type but limited disclosure on processing aids or residual monomers. No major recalls of Ziploc Mini Rectangle containers for chemical leaching have been documented in public databases. The company has faced historical scrutiny on single-use plastics and sustainability rather than acute chemical hazards in this product category.
How it compares in its category
Polypropylene food storage containers are mid-range in safety profile within plastics; they are considered safer than polycarbonate (#7), polystyrene (#6), and PVC (#3) for food contact because they do not rely on problematic plasticizers or BPA. Glass and stainless steel alternatives eliminate plastic leaching risk entirely but add cost, weight, and breakage risk. Within PP containers, Ziploc Mini Rectangles are standard injection-molded products with no specialty coatings, placing them at lower risk than treated or laminated variants.
If you buy it
Do not use for hot foods or liquids above 60°C (140°F); polypropylene softens and can warp at sustained temperatures near or above its glass transition point, increasing migration risk. Inspect containers periodically for clouding, cracks, or warping, and replace if damage is visible. Hand-wash or use the top rack of dishwashers to minimize heat stress; avoid prolonged contact with fatty or acidic foods at room temperature beyond a few hours if concerned about accelerated leaching. Store in cool, dry conditions away from direct sunlight, which can degrade polymer chains 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 (bisphenol A or S)
Polypropylene food-contact resin formulations do not intentionally incorporate BPA or BPS. No public reports of BPA contamination in Ziploc Mini Rectangle containers exist in recall or scientific literature.
Phthalates (plasticizers)
Polypropylene is a rigid plastic that does not require phthalate plasticizers to achieve flexibility; Ziploc Mini Rectangles are injection-molded without documented use of phthalate esters in the resin or processing.
Microplastics migration from container degradation
Over multi-year use, repeated heating cycles, dishwasher stress, or UV exposure can cause polypropylene to become brittle and shed microscopic particles, particularly if containers are stacked under weight or exposed to temperature cycling. Risk is low under normal use but increases with age and misuse.
Residual monomers (propylene)
SC Johnson does not disclose monomer residue levels for Ziploc Mini Rectangles. Polypropylene resin typically contains <1% residual propylene monomer; migration into food is minimal at room temperature and considered safe by regulatory standards, though not formally tested on this specific product.
Coating or treatment additives (if any)
No greaseproof or waterproof coating is disclosed for Mini Rectangle containers. If additives are used in molding or demolding processes, they are not publicly identified; risk is therefore low relative to coated or laminated alternatives.
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.