27oz Wide Water Bottle with Loop Cap vs Summit 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

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

Simple Modern Summit Water Bottle

Simple Modern

Summit Water Bottle

PFAS grade

Good 70/100

Overall grade

Good 66/100

Verdict

Buy

Hazard flags

⚑ 1

Material

stainless steel bottle, plastic lid

Confidence

72%

PossibleBacterial growth in lid and seal

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 Simple Modern.
  • We flag Bacterial growth in lid and seal on the Simple Modern and not on the Klean Kanteen.
  • The Klean Kanteen is 18/8 stainless steel, no interior coating where the Simple Modern is stainless steel bottle, plastic lid, 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