Tailgate Advice: Salt the Ice

There's a complicated science that explains why salt mixed with ice can keep your beer colder—it involves the properties of ice and hydrogen bonds—but we won't get into that here. Just listen to a professional food-maker and recreational beer-drinker when he says that it does. His cooler is lined with ice, a sprinkle of salt, and beer, in ascending layers. Try it and you, too, can drink the iciest of beers even after you've been at the tailgate for a few hours.
https://www.gq.com/story/tailgate-advice-john-currence