LOL Well Mat, I can take it you have never had a sip of Drambuie, Amaretto, etc. in one of these as an after dinner drink!
It is kind of like a shot glass on a stem. But to be politically correct, it is proper to sip a sweet, fruity liqueur or a dessert wine from this stemmed baby. Typically holds from 1.5 ounce to 4 ounces.
This glass was created so that the host/hostess could offer more expensive liqueurs to guests (and could afford to do so because of the limited size)!