Komax · Food Storage Containers
Komax Biokips Large Food Storage Containers 155-oz (Set of 2)
Lower PFAS concern, rigid PP containers have minimal risk, but brand makes no PFAS disclosure.
Komax Biokips are rigid polypropylene food storage containers without reported nonstick or water-resistant coatings that would introduce PFAS. Polypropylene itself does not require PFAS additives for its function. The brand does not publicly disclose PFAS testing or make PFAS-free claims, which is typical for basic food-storage plastics.
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Polypropylene (PP) food-grade plastic with locking lids
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
Komax Biokips containers are rigid polypropylene (PP, #5 plastic), a thermoplastic polymer chosen for food contact because it resists chemical leaching under normal kitchen conditions. PP has a higher melting point (~160°C) than soft plastics, reducing leaching risk during storage of room-temperature or mildly warm foods. The locking lids are also polypropylene-based, and food-grade designation indicates compliance with FDA standards for direct food contact, though manufacturer certification details are not publicly disclosed.
The brand's record and disclosure
Komax does not publicly disclose ingredient sourcing, manufacturing certifications (e.g., BPA-free statements), or third-party testing results for these containers. The brand maintains no known safety recalls or regulatory actions on Biokips containers. Absence of explicit safety claims is typical for budget-to-mid-range food storage; lack of transparency is not a violation but limits ability to verify purity of the specific resin batch.
How it compares in its category
Rigid PP containers sit in the middle tier of food storage safety; they avoid BPA and phthalate risks of older polycarbonate or vinyl alternatives. Glass alternatives offer zero leaching risk but are heavier and breakable. Premium brands (e.g., OXO, Rubbermaid) often disclose third-party testing; Komax does not, making direct comparison on purity difficult, though material chemistry is equivalent.
If you buy it
Do not use these containers in the microwave or oven, as heat can degrade polypropylene and increase leaching risk; check manufacturer guidance on safe temperature range. Store at room temperature or refrigerator only. Replace lids if they crack, discolor, or become brittle; these are early signs of polymer breakdown. Wash by hand or in cool dishwasher cycles to extend life; avoid chlorine-based cleaners and prolonged exposure to acidic or fatty foods at warm temperatures.
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 contamination
Polypropylene does not contain BPA or BPS as structural components. No recalls or reports of BPA leaching from Komax Biokips containers have been published.
Phthalates
Rigid polypropylene is not formulated with phthalates; these are typically added to soft PVC or vinyl for flexibility. Not a concern for this product type.
Microplastics from container degradation
Repeated thermal stress (e.g., hot dishwasher cycles, microwaving) or abrasion of the container surface can cause micro-scale polymer fragmentation. Risk is minimized by following care guidelines (cool water washing, room-temperature storage only).
Lid-seal degradation and off-gassing
Polypropylene lids may release volatile organic compounds (VOCs) at elevated temperatures or over years of storage; odor is the primary warning sign. Proper ventilation during initial use and replacement of cracked lids reduces this risk.
Allergen or contaminant transfer from manufacturing
Komax does not publish manufacturing facility audits or allergen controls. Food-grade certification implies baseline hygiene, but no third-party validation is publicly available for this product line.
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
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.