Its been about 10 years since I started using a menstrual cup (I use a Diva Cup). Ive now started on my third cup. Yes, they really do last that long! Im not sure how I got started using a menstrual cup. I imagine that, at the time, the idea of putting a little silicon cup in your vagina probably sounded a bit weird. But, if you think about it, it isnt any weirder than the idea of putting tampons up there. And if you really think about it and do your research, the idea of putting conventional tampons inside of you is totally crazy.