Pura Sport 18oz Bottle
Lower concern, though water filters rarely carry documented PFAS risk and brand transparency is absent.
Stainless steel and carbon filters are inherently lower-PFAS-risk compared to treated fabrics or nonstick surfaces. PUR hasn't disclosed PFAS testing or verification.
We flunk more products than we pass. This one earned its grade. How we grade
Material
stainless steel bottle, carbon/activated charcoal filter media
Lab data
No public lab test
You may also be interested in
Top-graded picks in the categories readers replace first, every one scored on the same rubric.
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product, all on its full breakdown.
Aquasure
Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System
- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product, all on its full breakdown.
Avocado
Vegan Mattress
- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product, all on its full breakdown.
What Pura Sport 18oz Bottle is made of, ingredients and materials
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.
What’s concerning
No PFAS disclosure
No public statement from the brand about PFAS in this product.
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.
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’s reassuring
Bare uncoated material
Recorded as a bare, uncoated material with no surface coating or treatment.
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.
How is this PFAS grade calculated?
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.
What is not known about PFAS in this product?
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- PUR has made a specific claim
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.