noun, a padded sleeve, usually for a relatively small object, coozies can serve a function, or they can simply be decoration (My friend's grandmother would knit bath tissue coozies by the truck load. Wierd. I guess sweaters weren't her thing.)

The Common American Coozie (Coasterus Redneckitus) is made of foam, and found wrapped around a can of beer or soda.

They help keep the drinks cold!