27oz Wide Water Bottle with Loop Cap vs OG Leave No Trace: which is safer?
Klean Kanteen 27oz Wide Water Bottle with Loop Cap is our pick: better on PFAS and on the overall hazard picture.
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
Nalgene
OG Leave No Trace
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleBacterial growth in filter media if unmaintained
PossibleActivated carbon dust or particle migration into filtered water
PossibleRO membrane degradation and microplastic shedding
Where these two actually differ
- We flag Cap or closure contamination and Bacterial or mold growth from moisture retention on the Klean Kanteen and not on the Nalgene.
- We flag Bacterial growth in filter media if unmaintained, Activated carbon dust or particle migration into filtered water, RO membrane degradation and microplastic shedding and Reduced filtration performance masking as safety on the Nalgene and not on the Klean Kanteen.
- The Klean Kanteen is 18/8 stainless steel, no interior coating where the Nalgene is Activated carbon and/or reverse osmosis filter media, 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