Beautifully crafted and expertly made,First Glass allows you to indulge your sexual desires with the smoothness and elegance of borosilicate glass.Every piece of these original,vibrating and non-vibrating sculptures has exceptional thermal qualities, allowing you to experiment with either hot or cold temperature play.Their seamless,non-porous surface,make the First Glass line easy to clean and sanitize.Enjoy with water,silicone and /or oil lubricants.Material: High grade borosilicate glass.Features: Hypoallergenic, Phthalate free.