This unique pair of whiskey glasses features Denali inside. Unique mountain relief bottom mimics the great walls of Denali. Store these glasses in the freezer, pour your whiskey, bourbon, scotch or tequila and the peaks chill and aerate in just 18 seconds without ice to enhance your whiskey-tasting experience. No more cumbersome whiskey stones or messy oversized ice cubes. These whiskey glasses have a heavy base and are made of premium lead-free crystalline glass ensuring exceptional clarity and brilliance. The glasses are dishwasher safe, however, the manufacturer recommends hand washing them with mild detergent and warm water to preserve the longevity and shine of the glasses. Gently dry them with a soft cloth to avoid water spots. 10 oz