Wells Chill Stainless Steel Filter Water Bottle vs Official ATP Tour All Purpose Thermo: which is safer?

Waterdrop Official ATP Tour All Purpose Thermo is the clear pick. Contigo Wells Chill Stainless Steel Filter Water Bottle carries a failing PFAS grade, and we never recommend buying a failing product.

Contigo

Wells Chill Stainless Steel Filter Water Bottle

PFAS grade

D 65/100

Overall grade

F 57/100

Verdict

Skip

Hazard flags

⚑ 2

Material

Stainless steel body, activated carbon filter cartridge

Confidence

72%

PossibleBacterial growth in filter cartridge

PossibleReduced filter effectiveness and contaminant breakthrough

Why this grade

Our pick

Waterdrop

Official ATP Tour All Purpose Thermo

PFAS grade

A 100/100

Overall grade

A 92/100

Verdict

Buy

Hazard flags

⚑ 2

Material

Borosilicate glass, stainless steel, silicone gasket

Confidence

72%

PossibleSilicone gasket degradation and bacterial growth

PossibleGlass breakage and sharp injury

Why this gradeBuy

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 filtration: see the full ranking