Prime Menstrual Cup - SMALL Ultra Soft, 100% Medical Grade Liquid Silicone, BPA and Phthalate Free, Odour Free, 8-10 Hours Protection, Eco-Friendly, Leak-Proof. The Prime menstrual cup is a reusable feminine hygiene product designed to collect menstrual fluid during a woman's period. It is made from medical-grade silicone, which is a flexible, hypoallergenic, and body-safe material. The cup is bell-shaped and comes in different sizes to accommodate varying levels of flow and individual anatomy. Insertion and removal techniques might take some practice, but many users find the cup to be a convenient and empowering option for managing their periods.