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 88/100
Verdict
Buy
Hazard flags
⚑ 3
Material
18/8 stainless steel, no interior coating
Confidence
92%
PossibleNickel leaching from stainless steel
PossibleSurface corrosion and pitting over time
PossibleBacterial growth in cap seals
Owala
FreeSip Sway Water Bottle
PFAS grade
Excellent 95/100
Overall grade
Excellent 87/100
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 Nickel leaching from stainless steel, Surface corrosion and pitting over time and Bacterial growth in cap seals 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.
- These two are 5 points apart, close enough that price and fit should decide it rather than our grade.
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