The menstrual cup is designed to be worn at any time, just like a tampon, so it stays in place and catches everything while sleeping for up to 12 hours! The cup actually stays in place due to suction - it creates a seal when inserted correctly so you shouldn't leak. That is why you must squeeze the bottom of the cup when taking it out in order to break the suction around the rim!
The menstrual cup is designed to be worn at any time, just like a tampon, so it stays in place and catches everything while sleeping for up to 12 hours! The cup actually stays in place due to suction - it creates a seal when inserted correctly so you shouldn't leak. That is why you must squeeze the bottom of the cup when taking it out in order to break the suction around the rim!