Yes, the Moon Cup is a legitimate product. It was the first silicone menstrual cup, created in the UK and sold for the first time in 2001. This menstrual cup is made with medical grade silicone making it hypoallergenic, durable, non-toxic, latex-free, and eco-friendly. The Moon Cup is reusable for up to 10 years or so, with proper care. It can handle heavy and light flow and comes in two sizes. The makers of Moon Cup have demonstrated a long-lasting commitment to environmental and social initiatives. They run their own Advice Line staffed by qualified medical personnel, are an employee-owned business, are careful to always use ethically sourced and produced packaging, and are certified by the Vegan Society. They were the first sanitary protection manufacturer in the world to be awarded Ethical Business status for its people- and environmentally-friendly practices. Moon Cup Ltd. also won a Women in Ethical Business Award, and they support menstrual health education programs worldwide, providing subsidized menstrual cups for charities and non-profit organizations. Moon Cup is distributed in the U.S. by the same company that makes The Keeper.