| A shot glass is a small glass cup, usually containing 1 1/2 oz. (or one shot) of liquid. A double shot glass holds (surprise!) 3 oz.
Shot glasses are a popular device for measuring/drinking fairly precise* quantities of hard liquor, and are often sold in gift shops as collectibles, emblazoned with "witty" phrases, names of cities, and heavy metal bands.
Those people fortunate enough (or unfortunate, depending on how you look at it) to be in close proximity to an institute of higher education will probably have no trouble acquiring a wide variety of shot glasses, as many students tend to be great fans of Lady Licks.
* The exact precision of the amount varies inversely depending on the intoxication of the individual doing the pouring.
Update: Ouroboros is now officially Shot Glass Fan #1! | 
