Tupperware · Food Storage Containers
Tupperware Season-Serve Marinating & Food Storage Container with Lid
Lower concern; standard food-storage plastic with no known PFAS risk, but Tupperware offers no transparency.
This is a rigid polypropylene food container, a bulk plastic material not typically treated with PFAS coatings. Tupperware has made no public disclosures about PFAS in this product line.
Shop Tupperware on Amazon →Material
Polypropylene (PP) plastic container and lid
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
This container is polypropylene (PP, #5 plastic), a thermoplastic polymer chosen for food storage because it is microwave-safe at moderate temperatures and does not leach BPA or phthalates by design. Polypropylene itself is chemically stable and resistant to hydrolysis, meaning water and acidic foods do not easily break down the plastic matrix. The lid is also PP, so there are no mixed-material interactions that could trigger leaching. PP does soften above 140°C (284°F), which limits its use in very hot dishwashers or direct heat.
The brand's record and disclosure
Tupperware has not published detailed safety certifications, testing reports, or ingredient transparency for its plastic formulations as of recent public records. The company does not disclose whether additives such as processing aids, stabilizers, or slip agents are used in this specific container. No recalls related to chemical leaching or contamination have been established for Tupperware food storage containers in major regulatory databases. The brand's silence on PFAS and other chemical transparency remains a notable gap compared to competitors who have made public commitments.
How it compares in its category
Polypropylene containers are a middle-ground choice: safer than older polycarbonate (#7) or polyvinyl chloride (#3), but less transparent than brands offering third-party testing or toxicology statements. Glass and stainless steel alternatives eliminate plastic chemistry concerns entirely but sacrifice durability and weight. Among plastic food-storage brands, Tupperware's long market history suggests regulatory compliance, but the lack of proactive disclosure trails behind brands like OXO, Rubbermaid, or Pyrex that publish testing summaries or certifications.
If you buy it
Do not use in the microwave above the manufacturer's stated wattage or time limits; stick to defrost and reheat cycles under 3 minutes. Avoid contact with very hot foods (above 60°C/140°F) and do not place directly in boiling water or on stovetops. Inspect the container and lid annually for cracks, stress marks, or discoloration; replace if found, as degradation can release polymer fragments. Hand-wash if possible; dishwasher cycles may accelerate wear and odor absorption 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 and bisphenol analogs
Polypropylene does not contain bisphenol A (BPA) or its replacements (BPS, BPF) as part of its base polymer. No documented recalls or findings of BPA leaching from Tupperware PP containers exist in FDA or CPSC records.
Phthalate plasticizers
PP is a rigid plastic that does not require phthalates (diisononyl phthalate, diisobutyl phthalate) for flexibility. Risk is structural, not product-specific, and no phthalate contamination has been reported for Tupperware food storage.
Microplastic shedding and polymer degradation
All plastics shed particles over time, especially when scratched, heated repeatedly, or exposed to UV light and detergents. Tupperware's durability is advertised, but long-term degradation and the migration of PP fragments into acidic or fatty foods cannot be ruled out after years of use, particularly if the container is damaged.
Odor and flavor absorption
Polypropylene is known to absorb and retain odors and colors from stored foods, particularly from oils and spices. This is a quality-of-life issue rather than a toxicological hazard, but indicates that porous PP structures may also absorb environmental contaminants if stored near chemicals or in heavily polluted environments.
Thermal stability and uncontrolled heating
If the container is heated above 140°C (284°F) or exposed to direct flame, PP can soften and release volatile organic compounds (VOCs) and oligomers (small PP polymer chains). Microwave use within guidelines is safe, but extended heating, boiling water contact, or dishwasher cycles on the highest heat setting may increase this risk slightly over time.
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
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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.