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    Very cool project!

    I wonder how it would be different if you did a “party” test. Place 12 beers in each cooler, then open and close each cooler once every 1-5 minutes, and see which keeps the beer the coldest at “initial cooler open”.

    I realize this might need a mechanical arm or something, but it’ll obviously be worth it.

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      Thanks, I think that’s a great idea! The results from this project are what they are because the coolers were sealed pretty tight. My first hunch is with a lot of air exchange the dry ice will disappear pretty quickly. I’m going to figure out a way to try this!

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      His conclusions about dry ice don’t surprise me personally, but a neat write up nonetheless.

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        Thanks! I wasn’t surprised by much either was pretty curious. I’m going to try some variations on the project just to goof around.

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        I’d be curious to see the graphs if you were actually trying to cool something: like half-fill the cooler with room-temperature bottles of water or cans of soda/beer. Then add (wet/dry) ice, and see what happens.