Science in the Common Good: Beer Koozie Test | Arts and Culture

Let's put the beer koozie to the test.

Let's put the beer koozie to the test.
Lisa Bremen

Outdoor barbecue season officially begins this weekend, and the amount of beer wasted has increased alarmingly. According to a fake statistics bureau that I made up entirely, a third of his beer opened during the summer remains unconsumed. The main reason is that the beer is now warmer. As the temperature of the mercury increases, canned and bottled beverages won't stay nice and cold all the way through. For sodas and mixed drinks, it's no big deal as all you have to do is add ice. But beer doesn't taste as good if it has ice in it (even if it just has “ice” in the name, in my opinion).

Some may say, “I don't have that problem.” I drink beer all at once, so it never gets warm. ” Those people may have other problems besides hot beer.

For the rest of us, some marketing genius invented the koozie. For those unfamiliar with the term, a koozie is a small foam insulating sleeve that fits around an aluminum can or, in more recent versions, a bottle. No one seems to know the origin of this name (or of the product itself, which became popular sometime in the 1980s), but my guess is that it's a corruption of the word “cozy.” I will. To keep the teapot warm, add an “o” to make it sound “cold.” Changing the “c” to a “k” must have been a byproduct of a time when bad spelling and superfluous umlauts were considered cool (see: “Mötley Crüe”).

Whatever its origin, koozies have some undeniable benefits. Prevents your hands from getting cold or covered in condensation. According to BBSITJMU, it's a good way to identify your beer at parties where it can easily be confused with similar products, which is his second most common cause of beer waste. It can be used as camouflage. My friend, who was pregnant but not ready to reveal her situation to her friends, covered her non-alcoholic beer with a koozie to avoid arousing suspicion. Finally, this is a personal sign that allows you to declare your allegiance to your sports team. Declare important feelings, such as “You don't think as much as I do when I'm drunk.” Or go formal with a tuxedo koozie. You can also support independent writers by purchasing felt, crochet, or cowhide koozies on

But how effective are they actually at keeping drinks cold? To help prevent wasted beer, I put them to the test. Recently, her husband and I conducted an experiment using three beers. I put her one inside the koozie, my husband held hers without the koozie, and the third one, also without the koozie, was placed between sips. We drank our beers at the same pace, alternating between two beers and her third, stopping every 5 minutes to assess the temperature. The temperature was 67 degrees Fahrenheit (not sweltering, but it was evening).

Within five minutes, there was already a subtle but noticeable difference between the beers we had in hand (with and without koozie) and the unhandled beers. The latter was still frosty, but the others were already beginning to lose their cool. Over the next 10 minutes, the gap widened. At 15 minutes, the beer without the koozie was warmer than the beer with the koozie, but the untreated beer was still the coldest. Finally, at the 20-minute mark, all three were unrefreshing, but the one that held the least remained the coolest.

Our conclusion was that the koozie was helpful, but not enough to limit the amount of time we spent drinking beer.

Would the results have been different if I had used a can? What if the temperature had been warmer (especially warmer than human body temperature)? What if I had put it in a koozie between sips of beer?

It's hard to say. If any science-minded beer enthusiasts are interested in conducting their own experiments, be sure to let us know your results.

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