Feminis’ original Aqua Mirabilis was a light liquid probably taken as drops on sugar cubes or mixed with water to make a delicious, citrus-flavoured medicinal drink. Legend has it that both French military leader Napoleon Bonaparte and German philosopher Johann Wolfgang von Goethe were among the many who regularly consumed huge quantities of it.

— Read more in The real story of eau de cologne: neither French nor German, the perfume with roots in an Italian medicinal drink at South China Morning Post. Hat tip to Kevin!