A container seal includes a top layer having an opening tab and a bottom layer thermally bonded to aluminum foil and a container. The top layer includes: first and second partial opening tabs; first and second opening guide-separating bands connected to the first and second partial opening tabs and extending along an inner edge of a container entrance so that the top layer and the bottom layer can be open along the inner edge of the container entrance when the first and second opening tabs are pulled; and a ring-shaped thermal bonding layer spaced from the first and second opening guide-separating bands by first and second separating lines and being in contact with a lip of the container outside the first and second opening guide-separating bands.