Perfect for an old fashioned or whiskey sour this Brewmaster Whiskey glass is constructed from soda lime glass and is the perfect capacity for a weekend sipper. It holds up to 9 fl. oz. of liquid and has a weighted bottom to help reduce the chances of a split beverage. Use it as a specialty drink glass or for an everyday water glass. The choice is up to the user. The large capacity is suitable for the use of ice for drinks that are better served on the rocks.