Reusable Menstrual Cup you should know everything. what is the menstrual cup, how to use, advantages and disadvantages, menstrual cup works. GynoCup is a silicon-based, most advanced menstrual cup for a tension-free period. It not just leak-proof and economical but reusable. GynoCup collects menstrual fluid inside instead of absorbing it, which is a safer method than pads and tampons. It’s highly recommended by doctors and very easy to use.