27oz Wide Water Bottle with Loop Cap vs 32-oz Chug 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
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleCap or closure contamination
PossibleBacterial or mold growth from moisture retention
Ozark Trail
32-oz Chug Water Bottle
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleBacterial growth and biofilm in stainless steel chamber
PossibleSeal degradation and plastic-to-metal interface failure
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 Ozark Trail.
- We flag Bacterial growth and biofilm in stainless steel chamber and Seal degradation and plastic-to-metal interface failure on the Ozark Trail and not on the Klean Kanteen.
- The Klean Kanteen is 18/8 stainless steel, no interior coating where the Ozark Trail is Plastic (BPA-free); 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: 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