DIY Romulan Ale
According to StarTrek.com, Romulan Ale is “an infamous blue alcoholic beverage with a powerful kick, the drink has been banned in the United Federation of Planets since before 2285, and is still not a commonly known commodity.” It “was illegal because of a Federation trade embargo in the late 23rd century (as mentioned in Star Trek II: The Wrath of The Wrath of Khan and Star Trek VI: The Undiscovered Country) through the late 24th century (per Star Trek Nemesis). (SOURCE: Romulan Cuisine on Wikipedia)
If you aren’t lucky enough to find a contraband source (Quark, perhaps?), you can try making your own via this recipe for Romulan Ale.
If you aren’t interested in drinking something that might affect your gray matter, you might be more interested in these energy drinks from ThinkGeek.