This is probably the worst thought out Arduino project I have seen in terms of repeatability and waste but thanks to the power of Siri it was a hit. The lesson here is not to polish something until it's good just prototype fast and release. I do think that if the overall experience was more slick it would have been much more successful.
You can check out the making of here.
Beeri, Siri for pouring a beer (badly) and the Android Bartender
