I'm surprised that none among us has recalled the "gins" which are traditionally used as benchmarks for the bottom of the rankings, notorious "Lucky Tiger" and infamous "Oso Negro".
The mere thought of either conjures images of Olongapo City on a murky night or Piedras Negras on a sun-blasted afternoon to my mind. Those are not good images, even when summoned by the thought of really bad gin.
The quality of generally available tonic waters, especially that horrible crud which oozes from the nozzles of most saloons has descended below the barely drinkable.