A tool for pressing lower rim section of a receptacle wall and a receptacle bottom comprises an inner tool part and an outer tool part. The outer tool part essentially surrounds the receptacle at its lower end. The inner tool part comprises tool segments that are moveable relative to the outer tool part between a retracted and a pressing position, wherein in the pressing position the lower rim sections are pressed together by opposed pressing surfaces of outer tool part and inner tool part. To avoid any contamination of the pressing surfaces and also delamination of the lower rim section of the receptacle, at least one groove is formed in the pressing surface of the tool segment and/or of the outer tool part.