What is the primary liquid used to fill a Freez/Frappe to the top?

The primary liquid used to fill a Freez/Frappe to the top is default milk. This base ingredient is integral to creating the creamy texture and flavor that characterizes this beverage. Default milk contributes not just to the overall taste, providing a rich and smooth quality, but also helps to balance the flavor profile with other components, such as coffee or flavored syrups, typically included in a Freez/Frappe.

Using milk as the primary liquid is standard practice in beverage preparation because it adds body and a pleasing mouthfeel, enhancing the drinking experience. While water, soda, and fruit juice may be used in different drink preparations, they do not provide the same creamy consistency or flavor complement that milk offers. This highlights why default milk is the correct choice for filling a Freez/Frappe efficiently and effectively.