Staying on the topic of Gin. Here is a bit of history from the fine folks at 33 Books…
“While researching 33 Jiggers of Gin, I became fascinated with a historical tradition of the British Navy based around a triangular piece of fabric known as a “Gin Pennant.” As the story goes, officers of one ship would raise it to invite officers of nearby ships for cocktails (usually gin-based, because England).”
Now I just need flags for beer, cider and bourbon.