I have tried a couple of the re-useable menstrual cups. The Diva Cup was too big. The Mooncup leaked...so I gave up on those. They are too $$ for me to be experimenting with further. But for long rides when it's that TOM I really like the disposable Instead cups. Plus they sit WAY high, up covering your cervix, so you can wear one AND wear a tampon. All of the reusable cups make it impossible to also wear a tampon.