No longer dilute your favorite drink or spirit with taste altering ice, Southern Homewares has the solution for you! This set of whiskey stones is the perfect way to slightly chill your favorite beverage while retaining all the taste integrity, just as the manufacturer intended. To use simply place stones in the freezer for a minimum of 4-6 hours and then use at your discretion. Three to four stones per glass is typically sufficient. Please note that these stones are meant to slightly chill your beverage and will only lower the temperature 8-15 degrees and are not designed to Cool as much as ice would. Made from 100% natural basalt these are food grade and freezer safe. Each stone is approximately 0. 8" X 0. 8" X 0. 8" In size. Stones may have slight irregularity in size. Make sure to rinse and dry before first use. To clean simply rinse off with water, allow to dry and store in the freezer until needed. Comes with velvet storage bag. Includes nine stones.