Go Series 18 oz Stainless Steel Water Filter Bottle vs 30 fl oz Stainless Steel Special Edition FreeSip Sway Insulated Water Bottle: which is safer?

Owala 30 fl oz Stainless Steel Special Edition FreeSip Sway Insulated Water Bottle is the clear pick. LifeStraw Go Series 18 oz Stainless Steel Water Filter Bottle carries a failing PFAS grade, and we never recommend buying a failing product.

LifeStraw

Go Series 18 oz Stainless Steel Water Filter Bottle

PFAS grade

D 65/100

Overall grade

F 53/100

Verdict

Skip

Hazard flags

⚑ 3

Material

Stainless steel body, activated carbon filter

Confidence

72%

PossibleBacterial growth in filter cartridge

PossibleFilter seal degradation over time

PossibleActivated carbon saturation and pesticide/chemical breakthrough

Why this grade

Our pick

Owala

30 fl oz Stainless Steel Special Edition FreeSip Sway Insulated Water Bottle

PFAS grade

A 100/100

Overall grade

C 78/100

Verdict

Buy

Hazard flags

⚑ 4

Material

Stainless steel interior and exterior, plastic lid and spout

Confidence

72%

PossiblePlastic lid/spout leaching (non-PFAS)

ReportedSilicone gasket degradation

PossibleBacterial or mold growth in valve assembly

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 bottles: see the full ranking