Devices and method for preparing beverages, particularly café au lait

The present invention relates to a method and devices for preparing beverages of the type that includes multiple liquids. The invention is particularly useful for preparing café au lait, and is therefore described below with respect to this application. A device and method for preparing café au lait by introducing milk into a drinking vessel to a level below its open top; and introducing hot coffee into the drinking vessel via a flow restrictor member formed with a plurality of holes of such size, number and distribution to permit the coffee to flow therethrough at a sufficiently slow rate to form a distinct layer over the milk with a minimum of turbulence and mixing with the milk.