20 oz Carbon Stainless Steel Filtered Water Bottle vs 24oz Stainless Steel Water Bottle: which is safer?

Brita 20 oz Carbon Stainless Steel Filtered Water Bottle is our pick: better on PFAS and on the overall hazard picture.

Our pick

Brita

20 oz Carbon Stainless Steel Filtered Water Bottle

PFAS grade

A 100/100

Overall grade

A 92/100

Verdict

Buy

Hazard flags

⚑ 2

Material

Stainless steel bottle with activated carbon filter cartridge

Confidence

72%

PossibleBacterial/microorganism growth in filter cartridge

PossibleFilter cartridge housing degradation over time

Why this gradeBuy

Soma

24oz Stainless Steel Water Bottle

PFAS grade

A 100/100

Overall grade

C 78/100

Verdict

Buy

Hazard flags

⚑ 4

Material

Stainless steel bottle (primary); internal cap/closure materials unspecified

Confidence

72%

PossibleCap/closure material composition (unspecified)

ReportedBacterial growth in filter cartridge and internal seals

PossibleVolatile organic compounds (VOCs) from plastic filter housing or cap

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 filtered water bottles: see the full ranking