Menstrual cups are the most low-cost menstrual product so far. Our cup is made of100% Medical Grade Silicone.They are supposed to be inserted into your vagina. It can collect up to 26 ml of blood and it doesnt leak out. On 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. You can be completely at ease and check on the cup once in 8 hours. There's absolutely no need to remove it while peeing or while doing absolutely anything else including swimming. Once you go cup, you always go yup!