A column still, also called a continuous still, patent still or Coffey still, is a variety of still consisting of two columns. Column stills can produce rectified spirit.
Coffey Still from Kilbeggan Distillery in County Westmeath in Ireland
A still is an apparatus used to distill liquid mixtures by heating to selectively boil and then cooling to condense the vapor. A still uses the same concepts as a basic distillation apparatus, but on a much larger scale. Stills have been used to produce perfume and medicine, water for injection (WFI) for pharmaceutical use, generally to separate and purify different chemicals, and to produce distilled beverages containing ethanol.
Swan-necked copper pot stills in the Glenfiddich distillery
Column still from Kilbeggan Distillery in County Westmeath in Ireland.
Old Ukrainian vodka still
Zambian artisanal Kachasu still and cooler