Bentgo Kids Stainless Steel Lunch Box
Stainless steel lunch box, lower PFAS concern for food contact
Bentgo Kids stainless steel lunch box is uncoated stainless steel, a material not associated with PFAS. No known coatings or treatments linked to PFAS contamination reported for this product line.
We flunk more products than we pass. This one earned its grade. How we grade
Material
stainless steel with no reported coatings
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Bentgo Kids Stainless Steel Lunch Box is made of, ingredients and materials
Bentgo Kids uses 18/8 food-grade stainless steel (austenitic type with 18% chromium, 8% nickel) for the main container body. This material is naturally corrosion-resistant and does not require protective coatings, glazes, or enamel finishes that can degrade and leach contaminants. Stainless steel does not leach significant quantities of metals into food at room temperature or during normal use, making it one of the lowest-risk food-contact materials available.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Gasket/seal degradation and bacterial growth
Rubber or silicone seals can harbor bacteria if not dried completely between uses or if they crack over time. This is a maintenance issue, not a chemical hazard inherent to the product.
Plastic components (lid, hinges, handle)
The lid and fastening hardware may contain plastic or elastomer components. No specific material disclosure is available, but plastic parts in contact with food should be inspected for cracks and kept away from direct heat to prevent BPA or phthalate migration if they are not explicitly stated as food-safe.
What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Nickel leaching from stainless steel
18/8 stainless steel is stable under normal food-contact conditions. Nickel leaching is not a documented concern for food-grade stainless steel at room temperature or moderate heat.
Heavy metals
Bentgo Kids stainless steel has no reported enamel, glaze, or paint coating; the material is bare food-grade stainless steel, eliminating lead/cadmium glaze risks.
Source, FDA ↗Microplastic shedding
Stainless steel does not shed microplastics. Risk is limited to non-metal components (seals, hinges) under mechanical wear.
The full breakdown
The brand's record and disclosure
Sistema (the parent company) manufactures primarily in New Zealand and Asia and has maintained a low-controversy profile in food-contact safety. The brand does not publish detailed chemical disclosures or third-party certifications on heavy metals or coating safety, though this is typical for stainless steel products (disclosure is less critical when material composition is inherently safe). No major recalls or safety violations specific to this product line are documented in public records.
How it compares in its category
Stainless steel lunch boxes sit at the safety premium of the category. They avoid risks present in painted/enameled steel (lead/cadmium in old glazes), ceramic liners (lead glaze risk), and plastic containers (BPA, phthalates with heat exposure). The trade-off is weight and durability of seals/hinges over time, which are mechanical rather than chemical concerns. Most competitors in the kids' lunch-box market use BPA-free plastic or coated aluminum, which introduce lower but non-zero chemical risks.
If you buy it
Inspect seals and gaskets annually and replace if cracked or discolored, as rubber components can degrade and harbor bacteria if unmaintained. Hand-wash rather than dishwasher when possible to extend gasket life, and ensure the box dries fully before sealing to prevent microbial growth. Stainless steel itself is extremely durable; food-contact safety does not degrade over time with normal use. Avoid storing highly acidic foods (vinegar, citrus) for extended periods if the box has any scratches, though this is a minor concern with proper care.
What we don’t know
- Basis
- Model estimate, 82% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Sistema has made none
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Lunch Boxes
Klean Kanteen
Double Wall Vacuum Insulated Stainless Steel Food Canister Container with Leak Proof Lid
- Stainless steel body, silicone gasket lid seal
- The brand calls it PFAS-free, which we have not verified
- Silicone gasket degradation
3 hazards checked on this product. See all of them.
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.