Reusable menstrual products, including cups, discs and period underwear, have gained traction as a cost-effective, long-lasting, environmental alternative to single-use products. In her lifetime, the average woman will use 10,000 menstrual products, and most of them wind up in landfills. The most popular options are single-use pads and tampons. They are made with plastic that can take hundreds of years to break down. But silicone menstrual cups can be reused for years, so they're cost-effective and long-lasting in addition to helping people reduce waste.