Crystal premium glass pops large blue butt plug. The entire Crystal collection is made of 100% hand-blown. Premium borosilicate glass. These items are of the highest quality and represent the most vibrant and durable glass products available today. Crystal items can be heated/cooled to personal taste. Crystal pops are available in two sizes and three colors. Each sold separately these body safe non-porous borosilicate glass plugs are designed for easy penetration and effortless cleaning.