If you'd like to learn how to build one too, check out my 3-part blog post:
part 1
part 2
part 3
I designed and built this bartender robot to make me some drinks. It's great fun at parties! I built it because I wanted to teach myself AngularJS. The robot utilizes the MEAN stack (MongoDB, Express.js, Angular.js, Node.js) and an Arduino to control the pumps that make the drinks.