Beerenburg started as literal packets of dried herbs an Amsterdam spice merchant sold to sailors — they'd steep the bundle in their own spirits for weeks, and only later did Frisian distillers turn it into a bottled product.
Beerenburg is a dark, bitter Dutch spirit made by macerating herbs like gentian root, juniper, and licorice in jenever or grain spirit. It's drunk ice-cold in small glasses, especially across the northern province of Friesland.