monbento Bento box container MB container MB Original 2020 Made in France
Unclear material composition; request full material disclosure from brand.
Monbento's MB Original bento box material composition is not publicly available. Without disclosure of specific plastics or coatings used, PFAS risk cannot be reliably assessed.
We flunk more products than we pass. This one earned its grade. How we grade
Material
plastic container, material type not publicly specified
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What monbento Bento box container MB container is made of, ingredients and materials
Monbento does not publicly specify the plastic resin type (polypropylene, polyethylene, polystyrene, or copolymer) used in the MB Original 2020 container. Without this detail, it is difficult to assess leaching risk under different temperatures and food types. The lack of transparency is unusual for a brand marketed as design-forward and durable, and contrasts with competitors who routinely disclose resin grade and certifications.
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.
BPA & bisphenols
Plastic resin type not disclosed; if polycarbonate or certain polystyrene formulations, BPA/BPS release is possible under acidic food, alcohol, or heat exposure. No test data available from brand.
Source, FDA ↗Microplastics
If container is heated or used for hot foods without material confirmation, polymer chain breakdown and microplastic shedding cannot be ruled out. Regular inspection for cracks is important.
Source, EPA ↗Bacterial or mold growth in seams and closures
Bento boxes with hinged lids and multiple compartments are prone to trapping moisture and food residue in seams if not thoroughly dried. This is a use and maintenance issue, not material toxicity, but affects product safety over time.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Phthalate plasticizers
Food-contact plastics are not typically formulated with phthalates in Europe due to REACH restrictions, but absence of material spec prevents full exclusion.
Coating or finish leachables
No coating, paint, or enamel layer is mentioned in product context; exterior and interior surfaces appear to be the resin itself. Risk is low if resin is food-safe grade.
The full breakdown
The brand's record and disclosure
Monbento has not published material composition, migration testing, or PFAS mitigation statements on their website or product pages. The brand has no recorded recalls or established contamination incidents in public databases. However, the absence of disclosure is a red flag; responsible food-contact plastic makers typically provide resin type, BPA/BPS status, and third-party testing summaries. A direct inquiry to the manufacturer is advisable before assuming safety.
How it compares in its category
Most premium reusable bento boxes (Zojirushi, Takenaka, Sistema) openly state polypropylene or tritan copolymer composition and certifications such as BPA-free or FDA compliance. Monbento's design and price point suggest comparable quality, but the lack of material disclosure puts it behind peers in transparency. For a product sold in France and Europe, CE marking may apply, but this does not confirm food-contact safety limits.
If you buy it
Do not use in microwave or hot-fill scenarios until the plastic type is confirmed; many polymers leach at elevated temperatures. Hand wash with cool to warm water and mild soap; avoid dishwasher heat cycles. Inspect the container regularly for cracks, cloudiness, or odor changes, which may indicate degradation or microbial colonization. Contact Monbento directly requesting the resin type, migration test data, and BPA/BPS status; use their response to decide on long-term retention.
What we don’t know
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Monbento has made none
Formulations change between production runs, so check the current label. How we grade.
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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.