Klean Kanteen Rise Food Meal Box
Lower concern. Stainless steel and silicone are inherently PFAS-resistant materials.
Klean Kanteen Rise uses stainless steel and silicone, materials without known PFAS coatings. No PFAS-treatment claims needed; basic materials present lower risk.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel container, food-grade silicone lid
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Klean Kanteen Rise Food Meal Box is made of, ingredients and materials
The Rise Food Meal Box uses type 304 or 18/8 stainless steel for the container body, which is chemically inert and does not leach metals under normal food storage or mild heating. The lid seal uses food-grade silicone rubber, a synthetic elastomer that does not contain BPA, phthalates, or typical plasticizers. Stainless steel's passive oxide layer prevents interaction with acidic or fatty foods, making it one of the most chemically stable food-contact materials available.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
Silicone elastomer degradation
Food-grade silicone is stable at room temperature and mild heating but can degrade microstructurally at repeated high heat or with prolonged contact to certain oils and solvents, potentially releasing oligomers into food. No specific degradation incidents have been reported for this product.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Stainless steel nickel leaching
Type 304 stainless steel contains 8-11% nickel; leaching occurs only under aggressive conditions (prolonged contact with strong acids or salt at high temperature). Standard food storage does not trigger leaching; no recalls or contamination reports exist for Klean Kanteen stainless products.
BPA & bisphenols
The Rise box uses stainless steel and silicone, neither of which contain BPA or conventional phthalate plasticizers by design. This design choice eliminates the primary chemical hazard of plastic food containers.
Source, FDA ↗Microplastic shedding
Stainless steel does not fragment or shed microparticles into food. Silicone gaskets are durable polymers that do not typically degrade into microplastics under normal use; failure mode is loss of seal integrity, not fragmentation.
Chromium leaching from stainless steel
Type 304 stainless steel is chromium-stabilized and passive; chromium does not leach into food under normal storage or mild heating conditions. Leaching risk is limited to prolonged exposure to concentrated chloride or strong caustic solutions, not typical food environments.
How is this PFAS grade calculated?
The brand's record and disclosure
Klean Kanteen has built its brand identity around non-toxic, sustainable materials and does not publicly disclose specific third-party safety certifications for this product model. The company has no documented recalls, contamination incidents, or regulatory violations specific to the Rise line. Brand transparency on material sourcing and manufacturing processes is limited compared to competitors offering ISO or FDA test reports.
How it compares in its category
Stainless steel food containers occupy the premium safety tier alongside glass; both avoid leaching risk entirely. Most alternatives use plastic (polypropylene or polyethylene terephthalate) with residual BPA or phthalate exposure risk, or silicone-only designs that may off-gas under heat. The Rise box's metal-plus-silicone hybrid eliminates plastic-contact food pathways while retaining portability.
If you buy it
Avoid repeated high-temperature dishwasher cycles above 60 degrees Celsius on the silicone lid, as prolonged heat can accelerate elastomer degradation and potential micro-migration into food. Inspect the silicone seal annually for cracks, discoloration, or loss of elasticity; replace if visible damage appears. Stainless steel itself is durable for years, but silicone gaskets typically require replacement every 18-24 months with regular use.
What is not known about PFAS in this product?
- Basis
- Model estimate, 78% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Klean Kanteen has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Klean Kanteen Rise Food Meal Box?
Klean Kanteen
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More lunch boxes 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.