27oz Wide Water Bottle with Loop Cap vs 64 oz Wide Water Bottle with Loop Cap: 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
Klean Kanteen
64 oz Wide Water Bottle with Loop Cap
PFAS grade
Excellent 95/100
Overall grade
Excellent 87/100
Verdict
Buy
Hazard flags
⚑ 2
Material
Stainless steel body, plastic cap
Confidence
75%
PossiblePlastic cap degradation and microplastics
PossibleCap seal durability and bacterial growth
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 Klean Kanteen.
- We flag Plastic cap degradation and microplastics and Cap seal durability and bacterial growth on the Klean Kanteen and not on the Klean Kanteen.
- The Klean Kanteen is 18/8 stainless steel, no interior coating where the Klean Kanteen is Stainless steel body, plastic cap, 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, 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