Now you can savour your fine whiskeys and single malts chilled without diluting their aromas and flavours with melting ice. This set includes two tumblers and six whiskey stones that you freeze and use in place of ice to chill your favourite spirit. It makes a great gift for any whiskey connoisseur. Tumblers: Glass. Dishwasher safe. 9.5 fl oz. 2.3” tall. Stones: Rinse, dry, and store in freezer until needed.