How does the menstrual cup work? Rather than disposing of tampons and pads after each use, the Lunette Menstrual Cup is reusable and lasts for years. The cup is easy to insert, comfortable to wear and can be used for up to 8 hours. You can even wear it at night, ensuring you'll always have a smooth period. The cup collects fluids instead of absorbing them, helping to keep you lubricated and comfortable throughout your cycle. When it's time to empty the cup, just pour away the contents, rinse the cup clean, and repeat the process. It's that simple!.