Naya · Filtered Water Bottles
KOR 650mL Nava Filter Water Bottle
Lower-concern water bottle, common filter materials carry minimal PFAS risk, but brand silence leaves some uncertainty.
KOR Nava's stainless steel construction and carbon-based filter media are standard materials with lower PFAS risk profiles. The brand makes no public PFAS claims or disclosures, which is typical for this product category.
Shop Naya on Amazon →Material
Stainless steel body; carbon/activated carbon filter media
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
No PFAS disclosure
No public statement about PFAS in this product.
Uncoated safe material
Bare, uncoated material (cast iron, stainless, carbon steel, or glass) with no surface treatment to contain PFAS.
The full breakdown
What it's made of and why it matters
The KOR Nava 650mL uses a stainless steel (likely 18/8 or similar food-grade) outer body, which is chemically inert and does not leach metals or chemicals into water under normal use. The internal filtration relies on activated carbon, a standard, well-documented material that traps chlorine, sediment, and some volatile organic compounds but does not introduce known toxins. Stainless steel avoids the aluminum leaching, ceramic microcracking, and polymer breakdown risks common in plastic or coated bottles.
The brand's record and disclosure
Naya has not published independent test reports, certifications (NSF, WQA), or explicit PFAS statements regarding this model or its filter media. The brand maintains minimal transparency on heavy metal or contaminant testing of the filter cartridge itself. Absence of disclosure is not evidence of contamination, but it limits independent verification. No recalls or documented safety incidents for this specific model are on record.
How it compares in its category
The stainless steel construction places it above plastic-body competitors (Brita, Pur) that carry BPA/BPS and phthalate concerns. Activated carbon filtration is entry-level; premium competitors (Clearly Filtered, LifeStraw) use multi-stage media and publish NSF certifications. The KOR Nava sits in the middle-safety tier: good material chemistry, minimal hazard, but lower transparency and certification than market leaders.
If you buy it
Replace the carbon filter every 2-3 months (or per manufacturer guidance) to prevent bacterial biofilm buildup in saturated media and maintain filtration efficiency. Wash the bottle body and lid with warm soapy water weekly; stainless steel resists most household cleaners but avoid abrasive scrubbers that can damage the interior finish. Do not use with very hot water immediately after filling if the filter has just been installed (allow a flush cycle to equilibrate temperature). Store in a cool, dry place when not in use to minimize filter degradation.
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.”
Bacterial growth in filter media
Activated carbon filters are prone to bacterial colonization if not replaced regularly or if bottle sits unused for extended periods. No data specific to KOR Nava maintenance intervals; risk is universal to this filter type, not brand-specific.
Stainless steel interior finish degradation
No recalls or reports of corrosion, leaching, or coating failure in the KOR Nava. Food-grade stainless steel is extremely stable; risk only arises with damage to the interior or extended contact with highly acidic liquids, neither commonly reported for this model.
Activated carbon cartridge leachables or dust
Carbon particles or residual ash can enter water if the filter is damaged or improperly seated. Naya provides no test data or manufacturing standard documentation; assume standard industrial hygiene applies but verify by flushing first use.
Silicone gasket or valve compounds
Stainless steel bottles typically use food-grade silicone seals or elastomers. No specific material disclosures from Naya; no reported failures or contamination incidents on record for this model.
Filter cartridge PFAS (separate from overall PFAS grade)
While activated carbon itself is low-risk, some commercial filters use Teflon-type coating membranes or PFOA-containing treatments as binders. Naya does not disclose filter composition or PFAS testing, leaving uncertainty despite the favorable PFAS verdict for the bottle overall.
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 filtered water bottles 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.