AuroTrends Food Grade Stainless Steel Ice Cubes, Durable and Reusable, Set of 8 Material: Food-grade stainless steel Size: 1" x 1" x 1" These premium stainless steel cubes have been tested and proven to outperform stones made from other materials. High quality cooling rocks to chill your whiskey, wine, champagne or other beverage optimally without dilution. These whisky chilling stones have rounded edges to prevent scratching of your favorite glassware.