Menstrual cups are the most low-cost menstrual product so far. Our cup is made of 100% Medical Grade Silicone and FDA approved. They are supposed to be inserted into your vagina. It can collect up to 30 ml of blood and it doesn’t leak out. On an average, we bleed just about 20 ml a day and the cup has the storing capacity of a minimum of 16 ml of blood depending on the size of the cup.