Menstrual cups are used internally, in place of a tampon.  The menstrual cup will catch your flow, and can be easily emptied into the toilet, rinsed and re-inserted.  You can swim and play sports while using a menstrual cup.  Menstrual Sponges are also known as Sea Sponges or Sea Sponge Tampons.  They grow in the Ocean, and have highly absorbent properties.  Women have been putting Sea Sponges to use internally as tampons for centuries.  Some women like to have the reassurance of a pad or panty liner too at first, and we have a lovely range of reusable sanitary towels and panty liners available.