27oz Wide Water Bottle with Loop Cap vs 25-oz FreeSip Tritan: 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
PossibleNickel leaching from stainless steel
PossibleSurface corrosion and pitting over time
PossibleBacterial growth in cap seals
Owala
25-oz FreeSip Tritan
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleMicroplastics release during heating or friction
ReportedLid gasket or valve bacterial colonization
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 Microplastics release during heating or friction and Lid gasket or valve bacterial colonization on the Owala and not on the Klean Kanteen.
- The Klean Kanteen is 18/8 stainless steel, no interior coating where the Owala is Tritan copolyester (BPA-free plastic), 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