column still

  1. A still used for the production of distilled spirits, consisting of two columns. Column stills are capable of continuous distillation (unlike pot stills, which can only produce individual batches). Because they can be used to distill large volumes of alcohol in a relatively short period of time, column stills are often used in large-scale spirit production. The alcohol produced by a column still tends to retain fewer congeners (flavors and aromas) from the fermented base product than alcohol from a pot still, but depending on the techniques used, a wide spectrum of flavors can be achieved.

Also known as a continuous still, patent still, or Coffey still.