CKF Inc · Disposable Food Containers
Avant Grub Biodegradable 6x6 Take Out Food Containers with Clamshell Hinged Lid Mi
Lower concern. Molded fiber is inherently PFAS-free material.
Avant Grub clamshells are plant-based molded fiber without chemical coatings, reducing PFAS risk versus coated paper or plastic. CKF Inc makes no PFAS claims, but the base material is not prone to intentional PFAS use.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Molded fiber (sugarcane/plant-based)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
Category baseline
food packaging is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
Avant Grub containers are molded fiber, typically made from virgin or recycled sugarcane pulp (bagasse), pressed into shape without synthetic binders or coatings. This material is inherently inert at typical food temperatures and does not release BPA, phthalates, or other plasticizers common to petroleum-based takeout packaging. Molded fiber is designed for single-use disposal and does not accumulate microplastics when heated or handled normally.
The brand's record and disclosure
CKF Inc. is a major North American molded fiber manufacturer; Avant Grub is their commercial line. No recalls, safety violations, or chemical contamination incidents are on record for this product line. The brand has not published explicit PFAS-free certification or third-party testing reports, but the material class itself does not require chemical additives that typically introduce PFAS in foodware.
How it compares in its category
Molded fiber containers sit between disposable plastic clamshells and coated paper boards. Unlike plastic, they pose no BPA or phthalate leaching risk. Unlike some coated paperboard, they are less likely to harbor legacy PFAS in coatings (though this depends on whether any water-resistant additive is used). They are generally preferred by food safety advocates as a low-contamination single-use option, though environmental impact varies by feedstock and local composting infrastructure.
If you buy it
These containers are safe for hot and cold foods at typical serving temperatures (up to roughly 180-190F for short durations). Do not microwave or expose to direct flame. Store in a dry place; molded fiber can absorb moisture and weaken over time if kept in humid conditions. Single-use design means replacement after one meal is standard; no cleaning or reuse is expected.
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.”
Moisture absorption and structural degradation
Molded fiber is porous and can soften or break down if exposed to prolonged moisture or condensation. This is not a chemical safety issue but a functional one; degraded containers may leak, risking food contact with non-food surfaces.
Ink or printed dye migration
If containers are printed with logos or text, inks may transfer to food under certain conditions (high heat, acidic content, or prolonged contact). CKF products typically use approved food-grade inks, but migration risk depends on specific ink formulation and storage conditions.
Mold or bacterial growth during storage
Molded fiber's porous structure can harbor microbial growth if stored in humid, warm conditions before use. This is not a material hazard but a sanitation concern; proper dry storage mitigates risk.
Heavy metals in post-consumer recycled fiber feedstock
If feedstock includes recycled content, trace heavy metals could theoretically be present; however, no testing failures or incidents have been documented for CKF or Avant Grub products, and sugarcane bagasse is typically a virgin or low-contamination source.
Formaldehyde or urea resins in binders
Molded fiber containers typically use starch or natural binders rather than synthetic resins. No formaldehyde emissions are documented for this product class under normal use conditions.
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.
More disposable food 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.