Sistema · Food Storage Containers
Sistema KLIP Storage Container
Lower concern for PFAS; polypropylene food containers typically avoid fluorochemicals, but Sistema makes no public PFAS disclosure.
Sistema KLIP containers are primarily polypropylene plastic, a material not inherently associated with PFAS. The brand does not market PFAS-free claims or hold third-party PFAS certifications, and publishes no transparency on coatings or additives.
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polypropylene (PP) plastic container
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
Sistema KLIP containers are made from polypropylene (PP), a thermoplastic polymer chosen for food contact because it does not contain BPA or BPS and is considered chemically stable at typical storage temperatures. Polypropylene is inherently resistant to many solvents and oils, making it durable for acidic or fatty foods. The material's melting point (around 130-140°C) means it can tolerate warm (not hot) foods and dishwasher cycles on low heat settings. The snap-lock lids typically incorporate polyethylene hinges, which carry minimal leaching risk under normal use.
The brand's record and disclosure
Sistema is a New Zealand-based manufacturer with no major product recalls linked to chemical leaching or contamination in its food storage line. The company does not publish detailed chemical composition disclosures or third-party safety certifications on its consumer websites, and has made no public PFAS statement despite industry-wide scrutiny. No established controversy or enforcement action against Sistema for food contact materials is on public record. The brand's opacity on manufacturing processes and chemical sourcing is typical of mid-market plastic manufacturers rather than a red flag, but it limits independent verification.
How it compares in its category
Sistema KLIP containers are competitively positioned in the mid-market plastic food storage category, comparable in safety profile to brands like Rubbermaid and Lock and Lock, all using polypropylene or polyethylene. They are more affordable and widely available than glass alternatives (Pyrex, Glasslock) but offer lower temperature tolerance and higher potential for mechanical wear over time. Polypropylene containers across brands show similar low-hazard profiles for cold and room-temperature storage; the main differentiator is lid seal durability and dishwasher longevity, where Sistema has a reasonable user reputation but limited independent testing data.
If you buy it
Do not expose KLIP containers to temperatures above 100°C (212°F) or prolonged microwave heating; warm water hand-wash is safer than hot dishwasher cycles if lids are prone to warping. Replace containers if lids become loose, cracked, or discolored, as degraded seals can allow bacterial growth and plastic particles may shed from stressed material. Do not use for acidic foods (vinegar, citrus) or fatty foods (oils, dairy) stored longer than 7-10 days, as polypropylene can slowly absorb and leach small amounts of trace residues over extended contact. Store in cool, dark conditions away from direct sunlight to slow polymer aging; KLIP's opacity helps limit light-induced degradation.
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/S)
Polypropylene does not require BPA or BPS as a base monomer or additive. Sistema KLIP containers are BPA-free by material design, with no reported cases of BPA presence in this product line.
Phthalates
Polypropylene is not a phthalate-containing plastic and does not rely on phthalate plasticizers. No phthalate contamination has been reported in Sistema KLIP products or in polypropylene food containers as a category.
Microplastics and polymer shedding
Mechanical wear, microwave heating, and repeated dishwasher cycles can cause microscopic PP particles to shed into food, especially if containers are scratched or lids degrade. This is a general risk for all polypropylene containers; Sistema's design and durability record do not eliminate this concern, though the magnitude of exposure from normal use is not quantified in published research.
Leaching of trace additives (heat stabilizers, colorants)
Polypropylene food containers may contain trace amounts of heat stabilizers, anti-oxidants, or colorants that can leach slowly into food, especially when heated or with fatty/acidic foods. Sistema does not disclose additive chemistry on consumer-facing materials, so residual leaching risk cannot be fully ruled out, though no reported contamination incidents exist for this brand.
Lid seal degradation and bacterial growth
User reports and warranty claims for Sistema KLIP lids indicate that snap hinges and seals can loosen or crack after multiple wash cycles or with age, compromising airtight storage. Once seal integrity is lost, containers become unsuitable for prolonged food storage and risk pathogenic bacterial growth, particularly for ready-to-eat foods.
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
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⚠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.