Lily Cup One If you’re new to menstrual cups, Lily Cup™ One is the one for you! Its small size and unique design make it the easiest to use and most comfortable menstrual cup for beginners. With Lily Cup™ One, periods are a breeze from start to finish. Petite and comfy, its ultra-smooth silicone body and leak-proof double rim offer up to 12 hours of non-stop protection. Its easy-to-reach loop makes Lily Cup One super simple to remove, while its collapsible design fits into even the smallest bag - so you’re never without period protection.