What type of glass is commonly used to serve whiskey neat?

The rocks glass, also known as an old fashioned glass or tumbler, is the correctly identified vessel for serving whiskey neat. This type of glass is designed with a broad base and a wider mouth, allowing for an enjoyable tasting experience by enhancing the whiskey's aroma and flavor. Its sturdy construction makes it ideal for pouring spirits without mixers and is typically used for serving neat pours or whiskey on the rocks.

The shape and style of the rocks glass also lend itself well to sipping spirits, which is important for a spirit like whiskey, where the appreciation of taste is paramount. Unlike other types of glasses, the rocks glass promotes a more intimate drinking experience that encourages savoring the complexity of the whiskey.