One obstacle here (Germany) is, that young girls learn, how to handle their period during sex ed. And often even young sex ed teachers just don't know about cups. They teach what they were taught which is tampons and pads. And menstrual cups come with a lot more questions than those. Applying them requires some experimentation and you actually have to kind of explore what your vagina looks like. Best case in sex ed: You are not actively prepared that you might have to do that. Usual case: You see a plastic model of a vagina that is shaped nothing like yours and get the vague feeling that it's bad/dirty to touch a real one.
In urban areas where you have younger teachers and more conversation about these taboo topics, cups are popular enough that you can buy them in every bigger drug store by now, but in rural areas it's as simple as nobody knows that this is an option.
In urban areas where you have younger teachers and more conversation about these taboo topics, cups are popular enough that you can buy them in every bigger drug store by now, but in rural areas it's as simple as nobody knows that this is an option.