Rocks glasses, also known as whiskey glasses or tumbler glasses, are typically used for serving drinks "on the rocks" or without ice. They have a thick, heavy base and are often short and wide to accommodate large ice cubes. Some synonyms for rocks glasses could include lowball glasses, old-fashioned glasses, or double old-fashioned glasses. These terms are often used interchangeably but some bartenders and mixologists differentiate between them based on specific design features. Regardless of the name, rocks glasses can be used for a variety of drinks and are a staple in any bar or home bar setup.