Starbucks in NYC will radio or call out your drink order to the barista while you're waiting in line for the cashier, then correlate by drink type (barista yells "iced tall 2-pump classic iced coffee!")
side note-- there is a specific order to the way they call the drinks, too, as in the example above: iced (go to the stack of plastic cups) tall (pick the size) 2-pump classic (put the flavor/sugar syrup in the cup) iced coffee (finally put the beverage in). Helps the baristas remember your drink order by correlating the auditory with the physical, aiding short-term memory.
side note-- there is a specific order to the way they call the drinks, too, as in the example above: iced (go to the stack of plastic cups) tall (pick the size) 2-pump classic (put the flavor/sugar syrup in the cup) iced coffee (finally put the beverage in). Helps the baristas remember your drink order by correlating the auditory with the physical, aiding short-term memory.