Humble Brush · Dental Floss
The Humble Co. Floss Picks
Lower concern; standard floss pick with no known PFAS-risk materials, but brand provides no transparency.
The Humble Co. floss picks are made from bamboo and nylon, materials not typically treated with PFAS coatings. No waterproofing, grease-resistance, or nonstick function is claimed or needed for this product category. The brand does not disclose PFAS practices, which is normal for oral-care items but limits full verification.
Shop Humble Brush on Amazon →Material
Bamboo handle, nylon floss picks
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
cosmetics 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
Humble Co. floss picks combine a bamboo handle with nylon floss strands. Bamboo is a natural material with minimal processing risk for intra-oral use; nylon is a synthetic polymer that does not leach or degrade under normal mouth conditions because it never contacts heat, extended moisture softening, or aggressive solvents. The floss itself is not a substrate for bacterial growth and is replaced frequently (daily or after use), limiting any microbial colonization risk.
The brand's record and disclosure
Humble Brush markets itself as an eco-conscious oral care brand focused on sustainable materials and plastic reduction. The brand does not publicly disclose manufacturing safety certifications, ingredient sourcing audits, or chemical testing on its website. No recalls, safety incidents, or regulatory action against Humble Co. floss picks are on public record. The brand's silence on chemical transparency is consistent with smaller sustainable brands that prioritize material choice over third-party safety documentation.
How it compares in its category
Floss picks are a lower-risk product category compared to cookware, food storage, or cosmetics because the contact time is brief, the contact surface is oral mucosa (not gastrointestinal absorption), and the materials do not undergo heating or chemical degradation. Bamboo handles are more sustainable and lower-contamination risk than plastic or metal handles. Nylon floss is chemically inert and equivalent in safety profile to standard dental floss from major brands; wooden alternatives (if any) would pose no advantage.
If you buy it
Store floss picks in a dry location to prevent mold or bacterial growth on the bamboo handle; replace the pick after the nylon floss frays or becomes ineffective, typically after 5-10 uses per pick. Do not boil, microwave, or soak bamboo handles in hot water, as prolonged heat and moisture can cause fiber separation and potential splinter risk. The product requires no special maintenance; discard when floss integrity is compromised.
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.”
Nylon microplastic shedding
Nylon dental floss does not fragment or shed microparticles under normal manual use; the fibers are not heated and experience only mechanical stress from picking action, which does not break nylon at typical tensile loads applied during flossing.
Bamboo splinter risk
Natural bamboo handles can develop splinters if subjected to moisture cycling, impact, or age-related fiber brittleness. This is a physical hazard (minor mouth abrasion) rather than chemical, but users should inspect picks before use and discard if handle shows surface damage or raised fibers.
Bacterial or fungal colonization on handle
Bamboo is a hygroscopic natural material and can harbor oral bacteria or fungi if stored wet or in humid environments. Risk is low because floss picks are used briefly and replaced frequently, but improper storage (e.g., in a sealed wet container) could promote microbial growth on the handle surface.
Chemical residues from bamboo processing
No public reports or testing data document residual pesticides, bleach, or processing solvents on Humble Co. bamboo handles. Bamboo grown for consumer goods typically requires minimal chemical treatment compared to conventional timber, but the brand provides no supply-chain audit or residue testing to confirm.
Azo dyes or colorants in nylon floss
Standard nylon dental floss is not dyed or colored in branded products; Humble Co. floss picks do not appear to use synthetic dyes. If the nylon is pigmented for visibility, azo dyes are not a typical concern for brief intra-oral contact, but the brand does not disclose dye source or safety testing.
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 Dental Floss
Cocofloss
Refill Trio
Coconut fiber, based floss with plant-based coating
Lower-concern dental product; natural materials and transparent PFAS stance, but no independent verification.
⚠Risky category by default
Dental Lace
Refillable Silk Dental Floss
Silk floss with compostable refillable packaging
Lower concern; silk floss with credible PFAS-free positioning and third-party certification.
✓Verified PFAS-free by a third party
Dental Lace
Plant Based/Vegan Floss Refillable Glass Container PFAS-Free (2 Spools/4-
Plant-based vegan floss (likely plant cellulose or silk fibers)
Lower-concern product with explicit PFAS-free claim; no third-party verification limits certainty.
⚠Risky category by default
More dental floss 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.