Coolships Rising: The Next Frontier of Sour Beers in the U.S. 

First We Feast

A koelschip—or coolship, as it’s been Americanized—isn’t much to look at. Unlike the tall, gleaming fermenters you have likely seen on a brewery tour, the device consists of a simple metal pan, usually longer than it is wide and only a foot or two deep. No one knows exactly where the coolship originated...

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