KOR Nava Filter Water Bottle - 24 oz (700 mL) Ocean Moss
Lower PFAS concern for the bottle itself; filter cartridge composition needs clarification.
The KOR Nava's stainless steel construction presents lower inherent PFAS risk compared to treated coatings or nonstick surfaces. KOR discloses nothing about PFAS testing or the exact composition of its replacement filter cartridges.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Stainless steel body, activated carbon filter cartridge
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What KOR Nava Filter Water Bottle - 24 oz (700 is made of, ingredients and materials
The KOR Nava bottle body is 18/8 stainless steel, which does not leach metals under normal use and resists corrosion. The activated carbon filter cartridge is the functional component, but KOR/Naya has not publicly disclosed the full composition of the filter media, including the type of activated carbon, any binding agents, or whether the cartridge housing contains plastic components that could degrade. Activated carbon itself is inert when functioning properly, but filter effectiveness and safety depend on manufacturing standards and cartridge replacement schedules.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Bacterial growth in filter cartridge
Activated carbon filters can harbor bacteria if cartridges are not replaced on schedule or if the bottle is not cleaned regularly. This is a maintenance issue, not a material defect, but KOR's guidance on replacement frequency should be clear and followed.
Filter cartridge plastic component leaching
If the filter cartridge housing or internal components contain plastics (polymer binding agents, plastic frames), degradation over time or contact with acidic/hot beverages could release trace compounds. KOR does not disclose these sub-components publicly.
Microplastics
Activated carbon cartridges can shed fine particles if the cartridge casing fractures or if media degrades. Without specification of cartridge structural durability and material composition, risk cannot be ruled out.
Source, EPA ↗What’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
Filter performance misrepresentation
No proven false claims on record, but absence of NSF certification means third-party validation of contaminant removal is not publicly available. Consumers should verify actual filtration performance if removing specific contaminants is the goal.
Stainless steel body integrity
18/8 stainless steel does not corrode or leach nickel/chromium under typical drinking water pH and temperature. No hazard reported for this material class in this application.
The full breakdown
The brand's record and disclosure
KOR (under parent company Naya) does not maintain a transparent public disclosure policy on filter cartridge composition, material sourcing, or third-party testing results. No major recalls or safety incidents are on record for this product line. The brand has not published certifications such as NSF/ANSI 42 or 53, which would validate filtration performance and material safety for drinking water contact. Lack of disclosure does not indicate a safety failure, but limits independent verification.
How it compares in its category
This bottle occupies the mid-range filtered bottle market alongside brands like Brita, Thermoflask, and S'well. Unlike some competitors, KOR Nava uses stainless steel rather than BPA-prone plastics for the main vessel, reducing chemical leaching risk from the body itself. However, most category competitors either publish NSF certifications or provide more detailed filter media disclosure. The 24 oz size is standard and reduces bacterial growth risk compared to larger tanks.
If you buy it
Replace the filter cartridge every 2-3 months or per manufacturer guidance (typically after 40 gallons), as exhausted carbon becomes a vector for bacterial colonization rather than a barrier. Do not use boiling water or hot beverages, as stainless steel bodies can withstand heat but the filter cartridge and any plastic fittings may not. Clean the bottle interior weekly with mild soap and dry thoroughly to prevent mold. Request current filter cartridge composition and NSF status from KOR customer service before purchase if filtration performance claims matter to your decision.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- KOR has made none
Formulations change between production runs, so check the current label. How we grade.
More water filters 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.