Komax · Food Storage Containers
Large Food Storage Containers, 35 Cup Food Storage Bins with Lids, BPA Free Airtight Food Containers for Kitchen Organization, Kitchen Storage
Lower PFAS concern for food storage; plastic bin category rarely requires PFAS treatments, but no affirmative disclosure.
Komax food storage containers are simple rigid plastic bins marketed as BPA-free. Food storage containers don't typically require water-repellent or nonstick coatings where PFAS are common.
Shop Komax on Amazon →Material
Plastic (likely polypropylene or copolyester); BPA-free
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 food storage containers are injection-molded polypropylene (PP), a thermoplastic polymer rated food-safe by FDA for direct food contact. Polypropylene has a higher melting point (around 130C) than many plastics, reducing leaching risk during normal kitchen use. The BPA-free designation indicates the manufacturer has not used bisphenol A in the resin or manufacturing process. PP does not inherently require PFAS water-repellent coatings for functionality, though some lid seals or surface treatments could theoretically introduce them.
The brand's record and disclosure
Komax is a privately held kitchenware brand with no major recalls or safety controversies on record for this product line. The company explicitly markets these containers as BPA-free but does not publish detailed material safety data sheets or third-party certifications (e.g., NSF, Cradle to Cradle). No public statement exists on PFAS use in manufacturing or coatings, consistent with industry silence on this issue among mid-market plastic container makers.
How it compares in its category
Large polypropylene food storage bins are among the safest options in the food storage category; glass alternatives eliminate plastic leaching risk entirely but are heavier and breakable. Komax's 35-cup capacity and airtight seal design are standard for this category. Competitors like Rubbermaid and Sistema offer similar PP formulations with comparable or identical hazard profiles; no material advantage distinguishes Komax.
If you buy it
Avoid microwave heating above 80-100C to minimize any polymer migration; hand-wash lids separately to prevent lid-seal degradation. Store dry foods, grains, and pantry items preferentially over fatty or acidic foods, which can slightly increase plastic-food interaction. Inspect containers yearly for stress cracks, discoloration, or clouding as signs of material breakdown; replace if visible damage occurs. Keep away from direct sunlight to slow UV-induced polymer brittleness.
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.”
Bisphenol A (BPA) and related endocrine disruptors
Product is marketed BPA-free. No evidence of BPA presence in Komax containers or typical PP formulations used in food storage. However, replacement bisphenols (BPS, BPF) are not explicitly ruled out; no third-party testing on record.
Phthalates and plasticizers
Polypropylene rarely requires phthalate plasticizers, but flexible components (lids, seals) may contain them. No recalls or test data specific to Komax products exist; risk is low but not independently verified.
Microplastics generation under thermal stress
Repeated heating, freezing, or mechanical stress can cause micro-scale polymer degradation and potential particle shedding into food. Risk increases if containers are used in microwave or dishwasher at high temperature; hand-washing minimizes this.
Lid seal and latch degradation over time
Consumer reviews indicate lids may lose airtight seal after 1-3 years of regular use, particularly with thermal cycling. Degraded seals reduce food preservation efficacy but do not constitute a direct toxicological hazard.
Mold and bacterial growth in compromised seals
If lids fail to seal properly due to warping or wear, containers may accumulate moisture and allow microbial growth. This is a food-spoilage risk rather than inherent product toxicity, managed through inspection and replacement.
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.