hi,
The small, flexible cup is made of silicone or latex rubber. Instead of absorbing your flow, like a tampon or pad, it catches and collects it.
Just before your period begins, tightly fold the menstrual cup and insert it like a tampon without an applicator. Used correctly, you shouldn’t feel it. It’s similar to putting a diaphragm or birth control ring in place.

Pros
It’s eco- and wallet-friendly: A reusable cup that costs $30 to $40 can last up to 10 years. That means less waste in landfills and less money over time. These benefits don’t apply to disposable brands though.
You can leave it in for 12 hours : Tampons need to be changed every 4 to 8 hours, depending on your flow. But cups can stay in longer, so they’re good for overnight protection. And once you get the hang of inserting it, there’s no need to wear a backup pad or liner.