Which type of container must bourbon be produced in?

Bourbon must be produced in new, charred oak containers. This requirement is essential in defining the character of bourbon and significantly influences its flavor profile. The process of charring the interior of the oak barrels caramelizes the natural sugars in the wood, which enhances the sweetness and adds depth to the bourbon with flavors like vanilla, caramel, and spice. Additionally, the use of new barrels is crucial because they have not been previously used for aging other spirits, ensuring that bourbon draws the maximum flavor and color from the fresh wood.

Other types of containers, such as old oak barrels, stainless steel tanks, and glass vessels, do not meet the legal requirements set for bourbon production. Old oak barrels may contribute residual flavors from previous spirits, while stainless steel and glass do not impart any characteristics that are essential to bourbon. Therefore, the specificity of using new, charred oak containers is what makes them integral to the bourbon-making process, ensuring that the spirit maintains its unique identity and quality.