Screw top closure

A screw top closure comprising a screw lid (10) with internal threading and a separate lid attachment (11) with external threading, said attachment being designed for application on the neck (12) of a container (13) to carry the removable lid, the lid attachment (11) being in the form of an annular element with an upper part (14) serving as a support for the lid (10) and outer and inner concentric tubular flanges (15, 16) the outer concentric flange (15) protruding downwardly for surrounding the neck (12) of the container (13) and the inner concentric flange protruding downwardly for entering into the neck (12) of the container (13) so that the flanges define between them in downward direction an open pocket (17) for receipt of the neck (12) of the container (13), the lid (10) being provided with an inner tubular flange (25) protruding downwardly from an upper portion (21) thereof, and being insertable into the lid attachment (11), the inner flange (16) of the lid attachment (11) and the inner tubular flange (25) of the lid (10) being so constructed and arranged that the inner tubular flange (25) may be inserted into sealing abutment against a lower portion of the inner tubular flange (16) of the lid attachment (11), the lower portion of the inner flange (16) having a reduced inner diameter and a lower portion of the inner tubular flange (25) of the lid (10) having an external peripheral enlarged rim (26) such that the inner flange (16) of the lid attachment (11) and the inner flange (25) of the lid (10) will remain in sealing abutment with each other during partial unscrewing of the lid (10) from the neck (12) of the container (13).