Ziploc · Food Storage Containers
Ziploc SmartSnap Rectangle Containers 2 Count
Lower PFAS concern for this basic rigid food-storage plastic, but no public disclosure from Ziploc parent company.
Ziploc SmartSnap containers are made from polypropylene, a common food-grade plastic not typically treated with PFAS coatings. Rigid food-storage containers generally carry lower PFAS risk than grease-resistant paper or treated fabrics.
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Polypropylene (PP) rigid plastic containers and lids
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 SmartSnap containers are rigid polypropylene (PP, plastic #5), a thermoplastic that does not contain BPA, phthalates, or vinyl chloride by design. PP has a melting point around 130°C (266°F) and is considered one of the safer food-contact plastics when used within temperature limits. The lids are also PP or polystyrene-based, with snap closures that create an airtight seal. Unlike softer plastics, rigid PP does not readily leach plasticizers under normal refrigeration or room-temperature storage.
The brand's record and disclosure
Ziploc (SC Johnson subsidiary) has not published dedicated chemical disclosure statements for this product line, nor has it pursued third-party certifications like BPA-Free verification labels common in peer products. However, no recalls, contamination incidents, or independent testing failures have been publicly documented for Ziploc rigid containers. The parent company's silence on PFAS and polymer additives is notable but does not indicate known violations, only lack of proactive transparency typical of mid-market consumer brands in this category.
How it compares in its category
Ziploc SmartSnap containers are mainstream and chemically comparable to similar PP rigid containers from Rubbermaid, Glad, and OXO at equivalent price points. They lack premium certifications (e.g., Cradle to Cradle, GreenGuard) that some brands pursue. Borosilicate glass alternatives eliminate polymer leaching risk entirely but cost 2-3 times more and break easily. For everyday food storage, Ziploc PP sits in the acceptable mid-range: safer than older polycarbonate or soft PVC, less transparent than glass, and less costly than stainless steel.
If you buy it
Do not expose containers to direct heat above 130°C (avoid dishwasher heated dry cycle and direct stovetop use); freezer storage is safe. Replace lids if they crack or no longer seal, as degraded plastic can shed microparticles. Wash by hand or in standard machine cycles with cool water. Do not store fatty foods (oils, butter) or acidic foods (vinegar, tomato sauce) for extended periods, as PP can absorb flavors and minor swelling may occur. Store out of direct sunlight to slow polymer aging.
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.”
Microplastics shedding from mechanical wear
Rigid PP containers can shed microparticles if lids are bent, snapped repeatedly, or cracked during use. Risk is low during normal handling but increases over years of repeated opening and closing. Washing and thermal stress accelerate polymer embrittlement.
Leaching from polymer additives (non-BPA)
PP does not require BPA or phthalates, and Ziploc containers show no documented leaching of plasticizers under standard testing. Minor absorption of food odors or fats may occur but does not represent a chemical hazard.
Thermal degradation above rated temperature
Exposing PP containers to temperatures above 130°C (such as dishwasher heat-dry or boiling water) can cause warping, lid seal failure, and potential release of volatile compounds from the polymer matrix. Not hazardous at normal room or refrigeration temperatures.
Colorants and UV stabilizers in plastic
Ziploc containers use opaque or translucent plastic formulations with standard UV absorbers and titanium dioxide pigment; no heavy-metal contamination has been reported. Formulations are compliant with FDA food-contact regulations.
Bacterial growth in lid seams and closure mechanisms
Snap-closure lids can trap moisture and food residue in crevices if not cleaned thoroughly, creating a microenvironment for bacterial colonization. This is a hygiene issue, not a material toxicity issue; regular handwashing prevents it.
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.