Like your favorite beverage on the rocks? Our Booze Cubes will keep your favorite beverage cold without diluting it. Made from recycled granite from the cores taken out of our Stone Drink Dispensers. Each tube comes with 4 black and 4 gray stone cubes. To use: freeze for three hours. Add two cubes to your glass and cover with your favorite spirits (about 2 oz). Let stand for five minutes and enjoy! Since granite is a natural product, color variation and differences with texture and detail will occur.