Tenga eggs are very flexible rubber eggs that feature a multitude of textures inside of them. They vary in density and texture but they are all uniform in size. Buy them individually or in a 6 pack. They are designed to be disposable but with the proper care they can have a longer shelf life. If you are new to the world of male masturbators, this is the best way to dip your toes in the water. They are in a category all on their own.