The development of the company is closely linked to the course of Germany's history.
Time and again, political changes have led to sometimes risky decisions.
In the documentary, brothers William and Dirk Verpoorten take viewers on a journey through time: Starting in the Lower Rhine region, via Berlin, which was full of vice in the "Golden Twenties", to Lower Bavaria.
It was there that the couple's grandmother raised a factory on her own during the war years.
At a time when eggs were an absolute scarce commodity.
This laid the foundations for the triumph of eggnog in Germany.
And it is no coincidence that Verpoorten moved to the place that stands for the economic miracle era like no other: the German capital Bonn.
Today, the great-great-grandsons of the dynasty's founder face a daunting task: the contemporary marketing of a drink that has remained virtually unchanged over the last 150 years and is at the heart of their success: eggnog.
First broadcast: Friday, November 02, 2018, 8:15 p.m., WDR.