However, it was Bonnie McGough's 1981 patent for the "Koozie" that came to the rescue of beer cans, in particular. But how, exactly? Optimal beer-drinking requires a Goldilocks-like balance of not ...

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 ...