Abstract: A device for preventing removal of a lid from a container. The device has a cover with a top which is adapted to fit over a lid of a container and an engagement means consisting of an upper continuous cylindrical wall and a lower section of integral and flexible leg segments. Each leg segment has a lateral portion or rib for engaging a neck part of the container to prevent removal of the cover from the container. Retaining means in the form of three independently rotatable locking rings prevent disengagement of the engagement means from the container. The deice is used on a typical drinking bottle with a screw on cap to prevent removal of the cap thereby maintaining hygiene and safety aspects of the liquid contents.