27oz Wide Water Bottle with Loop Cap vs Og Water Bottle W Filter Bpa 48oz Sailing One Life: 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
Excellent 100/100
Overall grade
Excellent 92/100
Verdict
Buy
Hazard flags
⚑ 2
Material
18/8 stainless steel, no interior coating
Confidence
92%
PossibleCap or closure contamination
PossibleBacterial or mold growth from moisture retention
Nalgene
Og Water Bottle W Filter Bpa 48oz Sailing One Life
PFAS grade
Good 70/100
Overall grade
Good 52/100
Verdict
Buy
Hazard flags
⚑ 3
Material
Copolyester plastic body, activated carbon filter
Confidence
72%
PossibleBacterial growth in filter housing
PossibleCopolyester leaching at temperature
ReportedFilter cartridge housing degradation
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 housing, Copolyester leaching at temperature and Filter cartridge housing degradation on the Nalgene and not on the Klean Kanteen.
- The Klean Kanteen is 18/8 stainless steel, no interior coating where the Nalgene is Copolyester plastic body, activated carbon filter, 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