Abstract: The invention concerns a beverage preparation device (10), said device comprising : a chamber (1) for receiving and agitating a liquid, said chamber comprising an opened top (11), an opened bottom (12) and a lateral side wall (13), said chamber presenting the shape of a solid of revolution, the axis of revolution (XX?) being oriented between the top and the bottom of the chamber, a rotating unit (2) for spinning the chamber (1) around its axis of revolution (XX?), and wherein the chamber presents a shape such that when the chamber is spinning, liquid present in the chamber forms a ring of liquid along the lateral side wall (13) of the chamber above the opened bottom (12).