27oz Wide Water Bottle with Loop Cap vs FreeSip Sway Water Bottle: 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
Owala
FreeSip Sway Water Bottle
PFAS grade
Good 70/100
Overall grade
Good 62/100
Verdict
Buy
Hazard flags
⚑ 2
Material
Plastic bottle with stainless steel interior
Confidence
72%
PossibleBacterial growth in lid mechanism
PossibleMicroplastics from seal 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 Owala.
- We flag Bacterial growth in lid mechanism and Microplastics from seal degradation on the Owala and not on the Klean Kanteen.
- The Klean Kanteen is 18/8 stainless steel, no interior coating where the Owala is Plastic bottle with stainless steel interior, 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, which covers 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