Color: Green Purple Clear Blue. Material: K9 crystal glass. Premium Whiskey Glass Cup with unique hand-cut classics stripe. This kind of glass cup is made from K9 Crystal glass. PERFECT GIFT FOR ANY WHISKEY LOVER. This gift set will arrive in a beautiful hard gift box that makes it a perfect gift idea. The straight line deep cut rock style whiskey glasses holds 7-8 Ounces Fluid. Do not use this glass in the case of sudden cooling and sudden heating, and cannot be used in microwave ovens or dishwashers. As we all know, the traditional blowing process is difficult to avoid the generation of air bubbles and material lines, and cold processing can perfectly avoid such problems, and finally obtain an extremely transparent, pure and flawless crystal texture.