Connector and Tube Set for use in a Medical Procedure

A connector for connecting a medical tube set to a medical container, comprising a collar connectable to a container, a cap comprising at least one opening for receiving a tube of a tube set, and an annular seal, wherein the cap is located in the collar between an inner surface of the collar and the seal, and the cap is rotatable relative to the collar wherein the collar comprises a generally cylindrical side wall open at its upper and lower ends, and an annular flange projects inwardly from the side wall at the upper end, and the cap comprises a disc defining at least one opening and having an outer annular rim, wherein the annular rim locates between a lower surface of the annular flange on the collar and the seal.