You've probably slapped a beer koozie on your cold brew at some point, but even though they do look nice, they're more than just a gimmicky accessory.

By comparison, the rubber koozie was at 50 degrees and the control was already up to 63.2 degrees. That’s 11.5 degrees and 24.7 degrees warmer than the Yeti, respectively.

The koozie (aliases: beer cozy, beer jacket, drink huggie) is everyone’s lockstep fun-in-the-sun method toward ensuring beers, sodas and (let’s be honest) more beers stay cool as we clutch ...

Make a DIY Wooden Beer Koozie With Built-In Bottle Opener. A simple, stylish project with a results you'll put to good use. By Eric Limer Published: Feb 24, 2017 1:29 PM EST. Save Article.

If we had a beer in a koozie that we set down between sips? Hard to say. If any science-minded beer drinkers out there care to conduct their own experiments, be sure to let us know the results.

The koozie should be capable of so much more. ... You need to keep the Chillsner in the freezer for about 45 minutes before, though, before you insert into a beer bottle of your choice.