What is the primary function of a demitasse cup?

A demitasse cup is specifically designed to serve espresso shots, which is why this answer is considered the primary function of the cup. The term "demitasse" translates to "half cup" in French, indicating its smaller size compared to standard coffee mugs. Typically, a demitasse cup holds about 2 to 3 ounces of liquid, making it the perfect vessel for a concentrated shot of espresso.

This design not only emphasizes the espresso itself but also contributes to the overall coffee experience by enhancing the aroma and taste when sipped from its smaller circumference. Its size affects the heat retention, keeping the espresso hot for longer, which is essential for enjoying the full flavor profile of well-brewed espresso.

Serving cappuccinos, lattes, or brewing water in a demitasse would not align with its intended purpose, as these beverages generally require larger serving sizes and different types of cups that accommodate milk and froth.