the invention relates to a container seal , in particular for a milk container , whereby said container seal may be mounted in a container lid and manually operated without tools . according to the invention , the container seal is at least partly made from plastic and may be inserted in a cut - out in the container lid , whereby the container seal seals the cut - out in the container lid and comprises a pouring opening . the invention further relates to a corresponding container lid and a container with said container seal .