What alcoholic beverage was invented by Zaphod Beeblebrox?

Zaphod Beeblebrox, the two-headed president of the Galaxy in the "Hitchhiker's Guide to the Galaxy" series, is known for many things, but not for inventing an alcoholic beverage.

He's more famous for:

* His love of adventure and chaos: He's a reckless and impulsive character who often gets himself into trouble.

* His unusual appearance: He has two heads, one of which is missing an eye.

* His possession of the "Infinite Improbability Drive": This device allows him to travel through space at incredible speeds by exploiting the "laws of probability".

While Zaphod might be a fan of a good drink, there's no mention in the books that he ever invented one.