I've never heard of these cups, so this thread has been very informative! I am a long time diaphragm user, for over 20 years. These cups sound just like a diaphragm. I have often liked the way the diaphragm works during my period, to keep all the blood contained. Now they have a product that does just that. I guess a question would be, you can't use the diaphragm with one of these things simultaneously, right? With the diaphragm, you just hook one finger over the rim to pull it out, so I don't get the need for a stem on these products. It did puzzle me that the link someone gave for the Diva, it says for women "post-childbirth and/or over 30. "Why would that be? I have used the diaphragm since before I was age 20 with no problem. Why would this be different?