Glass
I think we all can agree, that glass blown and formed into to sexy adult play toys, has a certain erotic appeal all to themselves. The exquisite beauty and precision, the refelection of light and the myriad of colours, not to mention how good they feel once you've slipped one of these beauties inside any of your orifices. There are dildos, butt plugs, probes, vibrators & prostate massagers and they all look like pieces of art!