Clearly Filtered · Portable Water Bottles
Clearly Filtered Water Bottle Removes 220+ Contaminants Double Wall Insulated Stainless Steel
Stainless steel and carbon filter; lower PFAS concern.
Stainless steel with activated carbon filtration forms this double-wall bottle. Both materials inherently avoid PFAS risk sources.
We flunk more products than we pass. This one earned its grade. How we grade
Material
stainless steel double wall, activated carbon filter cartridge
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What Clearly Filtered Water Bottle Removes is made of, ingredients and materials
The bottle uses food-grade stainless steel (18/8 or similar) for the double-wall construction, which is inert and does not leach metals into water under normal use. The internal filter cartridge relies on activated carbon, a well-established water treatment medium that traps contaminants through adsorption rather than chemical leaching. Stainless steel does not release lead, cadmium, or aluminum into stored water, and activated carbon itself does not off-gas volatile organic compounds (VOCs) when dry or at room temperature.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
Bacterial growth in filter cartridge if unmaintained
Activated carbon filters are porous and can harbor bacteria if not replaced on schedule or if the bottle sits unused for extended periods. Moist conditions in the filter chamber accelerate biofilm formation, which is not a material leaching hazard but a microbial safety concern specific to water filters.
Filter housing and cap leachables (plastic components)
While the main stainless steel body is inert, the filter cartridge casing may contain plastic materials and the cap/threading often use polypropylene or polyethylene. Long-term hot water exposure or dishwasher cycling could degrade these plastics, though documented leaching from Simple Modern caps is not on record.
Incomplete contaminant removal if filter is depleted or damaged
The claimed 220+ contaminant removal is marketing language; activated carbon performance depends on contact time, water temperature, and filter saturation. No published independent test results verify Simple Modern's specific reduction rates, so users may unknowingly drink inadequately filtered water if they do not replace cartridges on time.
Mold or mildew in double-wall chamber
The sealed double-wall design traps moisture and can allow mold growth if the bottle is not dried thoroughly after washing or stored damp. This is a hygiene risk inherent to all insulated double-wall bottles and requires diligent user maintenance.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Stainless steel corrosion or pitting with acidic beverages
Food-grade stainless steel is corrosion-resistant for neutral or slightly acidic water (pH 5-8), but prolonged storage of very acidic liquids (lemon juice, kombucha) may pit the interior over years of use. This is a durability rather than acute safety issue and is not specific to Simple Modern.
The full breakdown
The brand's record and disclosure
Simple Modern does not publish detailed material safety data sheets, third-party certifications (NSF, WQA), or PFAS testing results for this product line on publicly available channels. The brand markets the bottle as removing 220+ contaminants but does not disclose the filter's actual reduction percentages for specific contaminants or the test standard used. No major recalls or safety incidents involving this product model have been documented in public databases. The absence of transparency on filter validation is typical for consumer water bottle brands but limits independent verification of performance claims.
How it compares in its category
Stainless steel filter housings have lower concern than plastic alternatives in this category because they are not linked to BPA, phthalates, and polycarbonate degradation risks. Activated carbon filters are a mainstream, low-risk filtration method compared to UV or reverse-osmosis systems. However, many competitors (e.g., Hydro Flask, Contigo) offer similar stainless designs; Simple Modern's specific edge is price, not safety. This product sits in the middle-tier of water bottle filters and lacks third-party NSF or WQA certification that would distinguish it from cheaper alternatives.
If you buy it
Replace the filter cartridge every 30-40 gallons or 2-3 months of regular use; depleted carbon cannot trap contaminants and may allow bacterial biofilm to form inside the spent filter. Rinse the bottle and cap weekly and dry thoroughly to prevent mold growth inside the double-wall chamber. Do not use boiling water in the bottle if the cap has plastic threads or seals, as steam exposure may degrade them over time. Store the bottle in a cool, dry place and do not leave standing water in it for more than a few days between uses.
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
- Clearly Filtered has made none
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Portable Water Bottles
Klean Kanteen
27oz Wide Water Bottle with Loop Cap
- 18/8 stainless steel, no interior coating
- The brand calls it PFAS-free, which we have not verified
- Cap or closure contamination
2 hazards checked on this product. See all of them.
Klean Kanteen
Rise Classic Insulated Water Bottle
- stainless steel body, foam insulation, stainless steel cap
- The brand calls it PFAS-free, which we have not verified
- Cap gasket and seal contamination
Klean Kanteen
Classic Flip Seal Sport Cap
- Stainless steel bottle, plastic flip cap
- The brand calls it PFAS-free, which we have not verified
- Plastic cap degradation and microplastic shedding
3 hazards checked on this product. See all of them.
More portable 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.