27oz Wide Water Bottle with Loop Cap vs Double Vacuum Insulated Stainless Steel 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 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
Mira
Double Vacuum Insulated Stainless Steel Water Bottle
PFAS grade
Excellent 80/100
Overall grade
Good 72/100
Verdict
Buy
Hazard flags
⚑ 2
Material
stainless steel (bare, no known coatings)
Confidence
82%
PossibleSilicone gasket and plastic lid degradation
PossibleBacterial growth in the vacuum layer or lid seals
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 Mira.
- We flag Silicone gasket and plastic lid degradation and Bacterial growth in the vacuum layer or lid seals on the Mira and not on the Klean Kanteen.
- The Klean Kanteen is 18/8 stainless steel, no interior coating where the Mira is stainless steel (bare, no known coatings), which is most of the difference in these two grades.
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