Komax · Food Storage Containers
Komax Biokips Large Food Storage Container
Lower-concern option; rigid plastic food containers rarely require PFAS, but brand silence limits certainty.
Komax Biokips containers are rigid food storage made from standard thermoplastics (likely polypropylene), which typically do not require PFAS coatings or treatments. The brand provides no public PFAS disclosure or certifications, leaving confidence moderate rather than high.
Shop Komax on Amazon →Material
polypropylene (PP) or similar thermoplastic 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
Komax Biokips containers are polypropylene (PP, #5 plastic), a thermoplastic chosen for food storage because it resists cracking and has a higher melting point (around 130°C) than many alternatives. PP does not require PFAS for water or grease resistance in rigid food containers. The material is generally considered stable at room temperature and tolerates repeated hot fills and dishwasher cycles better than lower-grade plastics.
The brand's record and disclosure
Komax is a private-label brand sold primarily through grocery and home goods retail chains (notably Costco). The brand has not published explicit material safety certifications, third-party testing reports, or PFAS avoidance statements. No product recalls or safety controversies are on record for Biokips containers. The brand's silence on PFAS and material sourcing is typical for budget-tier plastic storage; it does not indicate a hazard but reflects low transparency.
How it compares in its category
Rigid PP food containers are among the safer options for storage; glass and stainless steel exceed them only in chemical inertness. Komax Biokips sits at the budget end of this category alongside similar store-branded options (Rubbermaid Brilliance, Pyrex Snapware). Unlike some ultra-cheap containers, Komax has not been flagged for elevated migration of contaminants, though independent lab testing of this specific product is not published.
If you buy it
Keep containers below 130°C; hot foods should cool slightly before storage to avoid warping the lid seal. Avoid prolonged storage of acidic foods (vinegar, citrus, tomato) as PP can slowly release trace oligomers under stress, though migration at typical kitchen temperatures is minimal. Inspect lids quarterly for cloudiness, cracks, or discoloration; replace if visible degradation occurs. Hand-wash lids to extend seal life, as dishwasher heat accelerates polymer fatigue.
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.”
Oligomer and monomer leaching (polypropylene)
PP containers can release trace amounts of oligomers (short polymer chains) and unreacted propylene monomer under thermal stress or prolonged contact with fatty or acidic foods. At typical kitchen storage temperatures, migration is minimal and well below regulatory limits, but heating repeatedly or storing aggressive foods may increase risk over years of use.
BPA/BPS contamination
Polypropylene does not require bisphenol A or analogues as a plasticizer or manufacturing input. No credible reports of BPA or BPS detection in Komax Biokips containers exist; PP is considered BPA-free by material class.
Phthalate plasticizers
Rigid polypropylene does not rely on phthalate esters for flexibility; these additives are primarily used in soft PVC and some polyethylene films. Komax Biokips, as a rigid container, is not expected to contain phthalates, though no brand-specific testing result has been published.
Lid seal and closure degradation
User reviews and general feedback on budget PP container lids frequently note loss of seal integrity over 1, 3 years of dishwasher use. Komax Biokips lids are not uniquely vulnerable, but lid replacement is a known wear item; loss of seal may allow food odor transfer or, rarely, microbial growth if containers are left warm and closed.
Microplastic shedding under thermal cycling
Repeated heating and cooling of rigid PP can induce micro-fracturing over time. While catastrophic shedding is unlikely at normal kitchen temperatures, prolonged use (5+ years) with frequent hot-fill or dishwasher cycles may generate trace particulates, though no peer-reviewed data confirms significant human health risk from storage container microplastics at this level.
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.