Tupperware · Food Storage Containers
Tupperware Snack- Stor Slim Airtight Food Storage Containers (Set of 3)
Lower PFAS concern; standard food-storage plastic without known treatment triggers.
Tupperware Snack-Stor Slim containers are molded polypropylene, a common, stable food-storage plastic unlikely to contain PFAS unless treated with stain or grease resistance. Tupperware makes no public PFAS disclosure for this product line. No third-party testing or certifications found.
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Polypropylene (PP) 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
These containers are polypropylene (PP), a thermoplastic polymer chosen for food contact because it is chemically stable and does not contain BPA or phthalates by formulation. PP has a higher melting point than polyethylene (around 130°C), making it suitable for warm foods and dishwasher cycles. The airtight lids likely use silicone or elastomer gaskets, which are also food-safe and do not degrade significantly with repeated opening and closing. No heavy metal pigments or problematic additives are standard in this product line based on available safety information.
The brand's record and disclosure
Tupperware has a long history in food storage and has faced no major recalls or documented leaching incidents involving this specific product line. The company does not publicly disclose detailed PFAS testing or alternatives to fluorinated coatings on its containers, leaving that aspect opaque. Tupperware maintains BPA-free labeling on most modern food-contact products and complies with FDA food contact regulations. No established independent testing has flagged this container set for chemical migration at typical storage or heating conditions.
How it compares in its category
Polypropylene containers are a middle-ground choice, safer than older polycarbonate (which contained BPA) but less durable long-term than glass or stainless steel. Compared to other plastic storage brands, Tupperware's formulation and manufacturing oversight are standard or slightly above average in the category. These containers lack the microplastic shedding risk of low-quality injection-molded plastics and are not prone to the off-gassing issues seen in some budget storage products. They are more affordable and convenient than alternatives but will eventually show wear and opacity after years of use.
If you buy it
Do not heat food inside these containers at temperatures above 120°C; use for cold or warm (not hot) food storage or transfer to ceramic or glass before microwaving. Hand wash or use the dishwasher's lower heat setting to extend the lifespan of the lids and seals. Replace containers every 3-5 years or if lids no longer seal properly, if plastic becomes cloudy, or if any cracks develop. Store away from direct sunlight and do not use for long-term storage of fatty or acidic foods at high temperatures, as chemical migration risk increases slightly in those conditions.
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 and phthalate leaching
Polypropylene formulation used in this product does not contain BPA or phthalate plasticizers by design. No documented incidents of migration from Tupperware PP containers under normal food storage conditions.
Microplastic shedding from wear
Over years of repeated use, dishwashing, and thermal cycling, any plastic container will eventually shed microscopic particles. This risk increases after 3-5 years; replacement at that interval minimizes ingestion.
Lid gasket degradation and bacterial growth
If seals are not cleaned thoroughly or lids crack, airtight integrity fails and food spoilage or pathogen growth can occur. Regular inspection of gasket condition and replacement of damaged lids prevents this issue.
Leaching at elevated temperatures
While PP is stable, polypropylene containers should not be used to heat food above approximately 120°C. At higher sustained temperatures, minor chemical migration into fatty or acidic foods is theoretically possible, though no specific incidents are documented for this brand.
Opacity and embrittlement over time
Tupperware containers are known to become cloudy and brittle after prolonged use and dishwashing cycles. This is a durability issue rather than a chemical hazard but signals when replacement is advisable.
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.