Cup Starter Bundle vs Menstrual Cup: which is safer?
Flex Cup Starter Bundle is our pick: better on PFAS and on the overall hazard picture.
Our pick
Flex
Cup Starter Bundle
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleResidual manufacturing compounds / silicone impurities
PossibleMold or bacterial colonization from improper storage
Lena
Menstrual Cup
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleBacterial colonization or biofilm growth
ReportedAllergic reaction to silicone or colorants
PossibleDegradation from improper cleaning or storage
Where these two actually differ
- We flag Residual manufacturing compounds / silicone impurities and Mold or bacterial colonization from improper storage on the Flex and not on the Lena.
- We flag Bacterial colonization or biofilm growth, Allergic reaction to silicone or colorants and Degradation from improper cleaning or storage on the Lena and not on the Flex.
- The Flex is Medical-grade silicone, no added fluoropolymers where the Lena is Medical-grade silicone (primary); no reported fluoropolymer or PTFE coating, which is most of the difference in these two grades.
- These two are level, close enough that price and fit should decide it rather than our grade.
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