Locking ring for containers

A container lid locking ring, for use with cylindrical containers having top and bottom rim beads, comprising:

• a cylindrical ring, formed of plastic, having a first projection for tightly engaging a recess in the lid of a container and a second projection, comprising a finger-like projection, for locking about the rim bead on the top of the outside wall of the container, such that said lid is securely held on the container;
• said cylindrical ring further comprising a seat for engaging the bottom of an over disposed container and a third projection, comprising a finger-like projection, for locking about the rim bead on the bottom of the outside wall of the over disposed container, such that the container and the over disposed container are locked together;
• and
• a fourth projection, disposed between said first and second projection, said fourth projection cooperating with said first and second projections to provide additional locking support and sealing for the lid and container.