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This was the popular term for illegally produced liquor during the 1920s.
Answer: What is bathtub gin? In 1920, the 18th Amendment ushered in the era of
prohibition. Did you know the 18th Amendment did not prohibit the consumption of alcohol
—only its manufacture, sale, and distribution? In 1933, the 21st Amendment restored the
legal manufacture of alcohol. Today, Professor Cornelius Ampleforth manufactures small
batches of gin under the brand Bathtub Gin.