For instance, on a summer day in New Orleans, Durran says the heat from condensation can raise the temperature of the beer by 6 degrees Fahrenheit in only five minutes. That's where the koozie ...

Most beer today comes in aluminum, whether it's 12-ounce cans for macro beers orvtaller cans many craft breweries use, and foam and cloth koozies fit perfectly over those cans in order to control ...