This whole recipe can be served as a slushy punch. Spoon the slush mixture into a large punch bowl, then stir in the carbonated beverage. This is handy if you are serving a large number of people all at once.
This is a perfect do-ahead recipe because it makes a big batch and can be kept in the freezer for several weeks. Scoop out just the amount you need at one time.
Slush beverage recipes rely on the alcohol to keep them from freezing solid. Because they remain slushy in the freezer, portions can be scooped out at a moment's notice.