From the interview: > ...they don’t like the fact that you have to rinse and reuse a menstrual cup. Plus, they’re difficult to insert and remove. I guess that

From the interview: > ...they don’t like the fact that you have to rinse and reuse a menstrual cup. Plus, they’re difficult to insert and remove. I guess that's how Flex is different from a menstrual cup. Not being a woman, I can't say how important those things are. I'd guess that they're not worth the extra $20/month, but maybe they are.