PUR · Filtered Water Bottles
Pura Sport 18oz Bottle
Lower concern water bottle; water-filter cartridges have minimal documented PFAS risk, but brand transparency is absent.
The Pura Sport 18oz bottle is primarily stainless steel with a carbon-based water filter. Stainless steel and activated charcoal filters are inherently lower-PFAS-risk materials compared to treated fabrics or non-stick coatings.
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stainless steel bottle, carbon/activated charcoal 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 Pura Sport 18oz uses 18/8 stainless steel (304-grade) for the bottle body, which is chemically inert and does not leach metals into water under normal use. The filter cartridge contains activated charcoal media, a well-established non-toxic filtration material that does not release particles or contaminants into drinking water when properly maintained. Stainless steel avoids the aluminum leaching risk found in some metal bottles and the BPA/BPS risk from plastic alternatives. The cap and seal components are typically rubber or silicone, both inert materials at room temperature.
The brand's record and disclosure
PUR (owned by Groupe SEB) manufactures widely distributed water filters and bottles with a 30+ year operating history; no major product safety recalls specific to the Sport line are publicly documented. The brand has not published transparency reports on PFAS testing or filtration claims, which is a gap compared to premium competitors but does not indicate a defect. PUR products are certified by NSF International in many markets, a third-party standard that covers bacterial growth and some contaminant removal claims. Independent testing of PUR filter cartridges has not flagged hazardous substances in the filter media itself.
How it compares in its category
The Pura Sport is positioned as a mid-range filtered bottle; it avoids the microplastic and BPA concerns of plastic bottles and the potential aluminum leaching of unlined metal alternatives. Compared to similarly priced bottles (Brita, Contigo filtered), the stainless steel material is durable and does not require replacement due to plastic degradation. Versus premium brands (S'well, Hydro Flask with filtration), PUR offers comparable material safety at lower cost but with less detailed public disclosure of filter performance. The activated charcoal media is standard across the category and poses no known health risk if not ingested directly.
If you buy it
Replace filter cartridges every 40 gallons or 2 months to prevent bacterial biofilm growth inside the filter housing, a known maintenance issue in all charcoal filters. Do not expose the bottle to sustained heat above 160°F (71°C); stainless steel itself tolerates this, but rubber seals may degrade. Rinse the filter housing with hot water weekly and allow it to air-dry to avoid mold. Store the bottle empty or refrigerated if left unused for more than a few days, as stagnant water in any filter system can harbor bacteria regardless of material.
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 housing
Activated charcoal filters are a known substrate for biofilm if not regularly replaced and cleaned. This is not a manufacturing defect but a maintenance requirement inherent to all charcoal-filter bottles; poor hygiene increases risk significantly.
Silicone/rubber seal degradation
Cap gaskets and seals in the Sport bottle may crack or leach oligomers if exposed to prolonged heat or UV light. This is uncommon under normal storage but can occur if bottle is left in hot cars or direct sunlight for weeks.
Charcoal dust or particle leaching
Properly manufactured activated charcoal cartridges are dust-sealed; no documented cases of charcoal particle migration into drinking water from PUR Sport bottles in consumer use.
Stainless steel corrosion
304-grade stainless steel (standard in PUR Sport) does not corrode or rust in freshwater under normal household conditions. Saltwater or harsh chemical exposure would be required to cause degradation.
Filter cartridge sourcing transparency
PUR does not publicly disclose where filter media is manufactured or whether it is independently tested for trace contaminants. This is a transparency gap rather than a documented hazard, but limits consumer confidence in supply chain safety.
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.