Autoseal West Loop Stainless Steel Travel Mug vs Cortland Chill 2.0 Stainless Steel Water Bottle: which is safer?

Contigo Autoseal West Loop Stainless Steel Travel Mug is our pick: better on PFAS and on the overall hazard picture.

Our pick

Contigo

Autoseal West Loop Stainless Steel Travel Mug

PFAS grade

C 75/100

Overall grade

C 71/100

Verdict

Buy

Hazard flags

⚑ 1

Material

stainless steel body, silicone gasket/lid seal

Confidence

78%

PossibleSilicone gasket degradation and bacterial/mold colonization

Why this gradeBuy

Contigo

Cortland Chill 2.0 Stainless Steel Water Bottle

PFAS grade

C 75/100

Overall grade

F 63/100

Verdict

Buy

Hazard flags

⚑ 3

Material

stainless steel, no reported coating

Confidence

82%

PossibleGasket and seal degradation

PossibleBacterial growth in inaccessible spaces

PossibleThermal stress and seal failure

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 insulated drink tumblers & travel mugs: see the full ranking