These cubes are the new ice. Because Onyx ice cubes will never melt and dilute your drinks. Simply dampen the cubes and place them in the freezer for a few hours, then slip a handful into a glass and pour out your favorite liquor, like a top-shelf single malt. In minutes, your drink is nicely chilled-and full strength. Afterwards, just rinse, and replace the stones in the freezer for next time. Always ready to chill when you are. Onyx ice cubes are made of 18/8 gauge stainless steel. Each measures approx. ¾" square with smoothed edges that won't mar your good bar glasses. Great for cooling down non-alcoholic drinks, too. Sold Individually.