The Old Fashioned glass, also known as a rocks glass or lowball glass, is a short, wide glass typically used for serving cocktails like the classic Old Fashioned. It usually holds between 6 to 10 ounces and features a heavy base, making it ideal for muddling ingredients and serving drinks over ice. This glass is designed to enhance the drinking experience by allowing the drinker to appreciate the aroma and flavor of the cocktail. Its sturdy construction makes it suitable for both stirred and shaken drinks, and it is a staple in many bars and homes for serving various spirits and mixed beverages.