With all it does for us, it’s hard to find fault with beer. If you wanted to be nitpicky, though, you could point to the opinion held by many that its flavor rapidly worsens as the beverage gets warmer.
At the same time, most beer drinkers are averse to dilute their beer by tossing ice cubes into it. So what do you do when you’ve got a rogue can of beer you forgot to stick in the fridge or cooler? Simple, you pour it into this new cup that instantly chills any liquid inside of it.