D is for distilling. Distilling is all about separation: alcohol has a lower boiling point than water and so the low wort (or beer: we make ours from a barley water mix to which yeast is added) produced from fermentation is distilled to separate the alcohol produced by the yeast from the water contained in the wort and then redistilled again to purify. We triple distil our vodka and then distil it a fourth time to make the gin (this fourth time with the botanicals placed in the vapour trail)