What type of glass is traditionally used to serve Spanish Coffee?

The traditional serving vessel for Spanish Coffee is a mug. This choice is appropriate because Spanish Coffee is typically a hot beverage, often mixed with coffee, liqueurs, and sometimes topped with whipped cream. A mug provides the necessary heat retention and is designed for comfortable handling of hot drinks, making it ideal for both serving and enjoying this particular cocktail.

Using a mug also aligns with the casual and cozy atmosphere often associated with enjoying coffee-based drinks, particularly those prepared with a flair or specific presentation, such as Spanish Coffee. The other types of glasses, such as highball, rocks, or cocktail glasses, are more suited for different kinds of beverages and would not offer the same functionality or appeal for serving hot coffee drinks.