I had the idea to make Bender dispense beer using an electrical switch and a solenoid. I purchased an NSF-certified solenoid valve and built a Frankenstein-esuqe setup to actuate it via a doorbell button. My plan was to have the button in one of his fingers and the beer come out another.
It turns out the orafice in the solenoid valve was much too small and convoluted, forcing the CO2 to come out of solution and pouring a glass of foam. This idea was eventually scrapped.