Is there any reason why menstrual cups have to be as big as they are? I know they have to be big enough to hold a decent amount of blood. But for people with a light flow/young girls could they make smaller ones an option? I know the lunette makes a smaller cup but its just a little bit smaller. I was just curious if there is a reason they could not makes the cup smaller. Since maybe companies would make more business if the cup was easier to put in.