A menstrual cup is a type of feminine hygiene device which is usually made of flexible medical grade silicone, worn inside the vagina during menstruation to catch menstrual fluid (blood containing uterine lining). Menstrual cups are shaped like a bell with a stem. Every 4–24 hours (depending on the design and the amount of flow), a cup needs to be removed and emptied, then rinsed and reinserted.
Manufacturers have different recommendations for when to replace menstrual cups, but in general they can be reused for five years or more. Menstrual cups are promoted as more practical, cheaper, and eco-friendly than pads and tampons. Unlike tampons and pads, cups collect menstrual fluid rather than absorbing it.
The majority of menstrual cup makers sell reusable cups, rather than disposable cups. DivaCup has the most popular brand name, and you can also buy it directly from manufacturers on sites like AliExpress, by searching for menstrual cups.