Coupling unit for coupling a component for a container, comprising: - A coupling equipment comprising: • A frame, • A housing constrained to said frame comprising at least one seat formed to receive said container in a stable manner, characterized in that the coupling equipment comprises: • A gripping device constrained to said frame with an ability to carry out a rotation with respect to said frame by means of a rotary kinematic mechanism having a horizontal rotation axis and comprising a retaining element configured to retain said component selectively, • A coupling device which is constrained to said gripping device with respect to said frame and comprising a coupling element configured to constrain a couplable portion of said component to a coupling surface of said container at a predetermined coupling position (Pa) of said component with respect to said container, • Said gripping device and said coupling device being configured so as to be able to move by means of said rotary kinematic mechanism in accordance with said rotation along an arc with curved trajectory at the following positions, o A Removal position (Pp), in which said retaining element is orientated so as to be able to receive at least one component to be retained, and o A coupling position (Pa), in which said retaining element and said coupling element are placed in such a manner as to bring into contact an abutment surface of said container and a couplable portion of said component. - A coupling equipment comprising: • A frame, • A housing constrained to said frame comprising at least one seat formed to receive said container in a stable manner, • A frame, • A housing constrained to said frame comprising at least one seat formed to receive said container in a stable manner, • A gripping device constrained to said frame with an ability to carry out a rotation with respect to said frame by means of a rotary kinematic mechanism having a horizontal rotation axis and comprising a retaining element configured to retain said component selectively, • A coupling device which is constrained to said gripping device with respect to said frame and comprising a coupling element configured to constrain a couplable portion of said component to a coupling surface of said container at a predetermined coupling position (Pa) of said component with respect to said container, • Said gripping device and said coupling device being configured so as to be able to move by means of said rotary kinematic mechanism in accordance with said rotation along an arc with curved trajectory at the following positions, o A Removal position (Pp), in which said retaining element is orientated so as to be able to receive at least one component to be retained, and o A coupling position (Pa), in which said retaining element and said coupling element are placed in such a manner as to bring into contact an abutment surface of said container and a couplable portion of said component. o A Removal position (Pp), in which said retaining element is orientated so as to be able to receive at least one component to be retained, and o A coupling position (Pa), in which said retaining element and said coupling element are placed in such a manner as to bring into contact an abutment surface of said container and a couplable portion of said component.