What is the primary filling for a soda cup?

The primary filling for a soda cup is typically a combination of ice and soda. When a soda cup is filled, ice is often added first as it helps keep the drink cold and prevents dilution as the ice melts. Once the ice is in place, soda is poured into the cup, usually filling it up to the rim. This method not only enhances the drinking experience by keeping the beverage chilled but also allows for a larger volume of soda to be enjoyed by providing a fillable space.

In contrast, filling the cup with soda only would not offer the same cooling effect and might lead to a warm drink. Filling the cup with ice only would leave no beverage for consumption. Using water with syrup is not typical for filling a soda cup; instead, it suggests a preparation method for fountain soda machines but does not reflect the common practice of serving soda. Therefore, the most common and accepted way to fill a soda cup is with ice halfway and soda.