Glass Pleasure Balls For Stimulation On The Go. Insert these elegant hand-blown glass pleasure balls into your vagina and stay stimulated all day long. Designed especially for Adam & Eve they are 1 inch in diameter with delicate handmade flowers embedded in the smooth glass spheres. They also exercise your vaginal muscles resulting in more control during sex and stronger orgasms. So discreet no one will know you're wearing them. A great gift item, too.