- 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. These machines usually have attractive clear product hoppers, and can fit on a counter top. 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 daquiris.
Source-Wikipedia..
So obviously you can't make it at home, I always hoped we can
Here is how the slush you buy in the shops is made:
http://slushdrinkmachines.com/how-slush-is-made (see related links for a link)
