A menstrual cup is a silicone rubber cup that you insert in your vagina during menstruation as a natural alternative to tampons or pads. Another one of the benefits of menstrual cups is that it has a wonderful effect on the environment and is zero waste. While using pads and tampons there is so much material that you waste. Think about it, you buy a cardboard box of tampons or pads, then you need to take it out of the wrapping http://www.cntopnurse.com/