Question for menstrual cup users...?
when you go upside down, approaching doing a handstand or something, would the blood pour back into you?
Answers: It would but not in a focal way because of where the cup lies (it'll be intrinsically a little slanted with the shape of your vagina), and also because your vagina isn't broad open, the walls of your vagina close towards each other. The blood would with the sole purpose go in your vagina, not backbone up into your cervix so not many places for it to go, clearly you won't be standing on your head all through your length so the blood will go back into the menstrual cup, plus the blood won't mar you as it would be in your vagina anyway - FDA did extensive study into this, there is no condition risk. .
I would not worry about it unless you are planning on spending an extended length of time upside down :) it probably will, but it doesnt matter because it would just move about right back down when you stand straight up and down again.
EWWWW. iDK My FRiEND HAS ONE BUT i DNT THiNK SO