Beautiful designs by Kiotos Glass dildos of almost unbreakable glass. Who does not know better, thinks that it's a glass of art on your nightstand. The big advantage of a glass dildo is that you can cool or heat it, to create an extra titillating effect. Keep it under cold or hot water and the glass takes the temperature of the water. The penetration with a hot or cold dildo gives a very different feeling than with a dildo at body temperature.