Pee Safe Menstrual cups are one of the most economical yet effective menstrual product so far. Our cup is made of medical grade silicone and is supposed to be inserted into your vagina. Large size menstrual cup can collect up to 30 ml of blood and no, it doesn’t leak out. On an average, we bleed just about 20 ml a day but never forget the thumb rule with any period products; keep a check every 4-5 hours.