A slush or a slushie is a flavored frozen drink. Frozen carbonated beverages, typified by the Slurpee or ICEE, are made by freezing a carbonated drink. These machines are complicated and expensive, and notably require a carbon dioxide supply. They make a very fine and ‘dry’ slush. Frozen uncarbonated beverages are made by freezing a non-carbonated juice or liquid. These machines do not require a pressure chamber, and so are much cheaper and easier to maintain. They make a slightly wetter slush. They are notable in the wide variety of drinks they create, including coffee-flavored ices and alcoholic drinks like margaritas and daiquiris.
Conventional slush drinks, typified by the Slush Puppie, use a single slurry made by freezing a sweetened base, similar to apple juice. This slurry is mixed at serving time with a flavoring syrup. These drinks are notable in that the flavored syrup can be drawn out of the drink, leaving a relatively-unflavoured base ice behind. ‘Instant’ slush drinks (beverages that turn to slush upon opening) are formed via supercooling (e.g. Slush-It!, the Chill Chamber which allows businesses to store beverages at below freezing temperatures, and supercooled Sprite from Coca-Cola which required special vending machines).
The Daily Omnivore 
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