out of small oak barrels that could be easily moved and re-cycled (named quarto or feuillette), similar to the modern stainless keg used today. The concrete tank came about one hundred years ago ...

The specific grain used, such as rye ... Scotch must be aged for a minimum of three years in oak barrels, while U.S. bourbon is required to contain at least 51 percent corn and is aged in charred ...