Abstract: A keg is formed from (A) a shaped jacket or liner forming a container, obtained from at least two nonsymmetrical parts (1a, 1b) welded together, one of the parts containing an opening provided with a neck, and (B) a filling/tapping device (3) positioned in the neck of the opening. The part of the container with the filling/tapping opening contains a riser or peripheral skirt (13) having a height at least equal to that of the outer part of the filling/tapping device and, optionally, sufficient to contain at least one cut-out forming a handle, and while the neck of the opening contains a part (9) extending inside the lumen of the jacket and having a limited diameter at its end (10), so as to permit passage and maintenance of the tapping device (3), and containing at least one other opening (11), advantageously on the periphery of the opening for passage and maintenance of the tapping device.