What is an essential characteristic of a Rocks glass?

A Rocks glass, also known as an Old Fashioned glass or lowball glass, is specifically designed for serving alcoholic beverages, particularly those served "on the rocks" or with ice. One essential characteristic of a Rocks glass is its thick bottom.

The thick bottom serves several purposes: it provides stability for the glass, which can prevent spills, especially when the drink is being poured over ice. This design also helps maintain the temperature of the drink, as it can minimize the transfer of heat from the hand to the beverage. Additionally, the heavy bottom contributes to a more substantial feeling in the hand, making it comfortable to hold.

In contrast, the characteristics described in the other options do not accurately depict a Rocks glass. A tall and narrow design typically refers to a highball glass, which is used for different types of drinks. Using a Rocks glass solely for shots is incorrect; it is versatile and used for various cocktails like whiskey or mixed drinks. Lastly, a Rocks glass is not designed for wine, as specific glassware exists for that purpose, such as wine glasses which enhance the wine-drinking experience through their design.