A dispenser 100 for dispensing a beverage that is a mixture of beverage components 170 positioned in the dispenser body and of beverage components 142 positioned in the dispenser door; a pouring unit 500 for said dispenser; a method for preparing a beverage with said dispenser. A method of mixing beverage components. A method of dispensing beverage components. A method of dispensing milk from a nozzle 536. A user interface for a beverage dispenser 100. A method of calibrating a non-stepper motor. A method of operating a beverage dispenser 100 without exceeding a power rating. A beverage cart 1300 for an aircraft, with a foldable dispensing unit 1310 and a foldable control panel 1320. A spout 2150 or an adaptor for a bag-in-box, with a lateral outlet port 2155; a correspondent kit and a method for dispensing from said bag-in-box.