Steriliser vs Steriliser Purple: which is safer?

Ruby Cup Steriliser Purple is our pick: better on PFAS and on the overall hazard picture.

Ruby Cup

Steriliser

PFAS grade

B 80/100

Overall grade

D 68/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Stainless steel heating chamber with silicone/plastic components

Confidence

72%

PossibleSilicone/plastic component degradation

PossibleMineral or bacterial buildup in water chamber

PossibleSteam or thermal damage to menstrual cup

Why this gradeBuy

Our pick

Ruby Cup

Steriliser Purple

PFAS grade

B 80/100

Overall grade

C 72/100

Verdict

Buy

Hazard flags

⚑ 2

Material

stainless steel steriliser/heating element

Confidence

72%

PossibleElectrical safety (heating element corrosion)

PossiblePlastic or silicone seals/gaskets degradation

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 menstrual cups: see the full ranking