Wooden barrels are what make the magic happen in your favorite bottle of whisky. They’re also the source of a long-standing problem in the spirits industry: They leak. A lot.
At Bacardi Limited, the world’s largest privately held spirits company, barrel leakage is a massive headache. Consider the company’s Dewar’s blended Scotch whisky brand (just one of the dozens it owns). Most of the time, Dewar’s will have over 100 warehouses full of aging barrels of whisky, 25,000 casks in each one….

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