Made of medical-grade silicone, these cups have extra grip so it can sit more stable and be leakproof. Our cups can last for up to 10 years if cared for nicely. Menstrual cups can be easily folded and inserted. Once inside like an usual tampon, they should sit a few inches from the cervix. They can hold from 15ml to 25ml of blood. Use-Wash-Repeat!