How’s this for a class project! Based around a PIC32 Microcontroller and sporting a touchscreen interface, it allows the user to custom mix their own drinks or select one of the preset options programmed into it.
There’s also some clever use of RFID technology here as well. RFID tags embedded in the cups are used to match up users with their selections. Faster than you can say “Same again please, Bar Tender.” It’ll whip up your usual based on your previous choice.