Stainless Steel Filter Water Bottle vs 27oz Wide Water Bottle with Loop Cap: which is safer?
Klean Kanteen 27oz Wide Water Bottle with Loop Cap is our pick: better on PFAS and on the overall hazard picture.
Stainless Steel Filter Water Bottle
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
LikelyBacterial growth in filter housing
PossibleFilter cartridge material leachables (unknown composition)
PossibleSynthetic rubber gasket degradation
Our pick
Klean Kanteen
27oz Wide Water Bottle with Loop Cap
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleCap or closure contamination
PossibleBacterial or mold growth from moisture retention
Where these two actually differ
- We flag Bacterial growth in filter housing, Filter cartridge material leachables (unknown composition), Synthetic rubber gasket degradation and Inadequate filter media performance claims on the and not on the Klean Kanteen.
- We flag Cap or closure contamination and Bacterial or mold growth from moisture retention on the Klean Kanteen and not on the .
- The is Stainless steel body with internal water filter media where the Klean Kanteen is 18/8 stainless steel, no interior coating, which is most of the difference in these two grades.
- The gap is 30 points, wide enough that this is not a close call, and the Klean Kanteen is the one to buy.
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
More portable water bottles: see the full ranking