White Rhino Produces a very unique line of high-quality smoking accessories. The White Rhino Glass Slider (also referred to as a glass blunt) is a specific type of smoking utensil. Its adjustable slide mouthpiece allows for an adjustable bowl size. You can pack a little small baby bowl or you can load it up with a cigars amount of material. Simply push the mouthpiece forward as ashing is necessary. These are made out of durable borosilicate glass.