Highballs are a type of simple cocktail consisting of a spirit and a carbonate. They are served in tall, ice-filled glassware (often also referred to as a Highball or Hi-ball glass).
Highballs can be any spirit and any of a number of effervescent beverages – for example, Vodka Soda, Gin and Tonic, Rum and Coke – although, with the growing popularity of long refreshing whisky drinks, highballs are most commonly used as a shorthand in drinks industry jargon when referencing Whisky & Soda.