Process and installation for manufacturing metal containers and the metal container obtained with the process. The process includes supplying a metal disc, extruding the disc to form a metal container, applying a coating on the inside of the container, deforming the open end of the container to obtain a neck with a curled portion. The curled portion is pressed to obtain a flat surface in a plane normal to the main axis of the container. The process further includes machining the curled portion that has been previously pressed to remove the coating from the curled portion, leaving the metal of the container exposed.