What is one type of beverage that can be served as a Coolatta?

A Coolatta is a frozen beverage that typically features a blend of ice and flavored liquid, making it a refreshing treat. Smoothies qualify as a type of beverage that can be served as a Coolatta because they often combine fruits and other flavorings with ice, which aligns with the icy, slushy texture characteristic of Coolattas.

The other options do not fit the definition of a Coolatta as well as smoothies do. Fruit punch is typically a non-frozen, liquid drink that doesn't have the icy consistency needed. Hot chocolate is a warm beverage and does not align with the frozen nature of Coolattas. Espresso, serving as a concentrated coffee drink, is also not icy and lacks the blended texture that defines a Coolatta. In contrast, smoothies capture the essence of a Coolatta by combining icy elements with flavorful ingredients, making them a fitting answer.