27oz Wide Water Bottle with Loop Cap vs 36 oz Grasshopper: 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
YETI Rambler
36 oz Grasshopper
PFAS grade
Good 70/100
Overall grade
Good 62/100
Verdict
Buy
Hazard flags
⚑ 2
Material
stainless steel inner; non-PFAS insulating foam
Confidence
75%
PossibleRubber gasket and lid degradation
PossiblePowder coat finish chipping
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 YETI Rambler.
- We flag Rubber gasket and lid degradation and Powder coat finish chipping on the YETI Rambler and not on the Klean Kanteen.
- The Klean Kanteen is 18/8 stainless steel, no interior coating where the YETI Rambler is stainless steel inner; non-PFAS insulating foam, 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