Abstract: A lid for a container having an open top with a rear wall having a snap slot and a hook slot, the lid having a latch mechanism with a snap member and a hook member projecting downward for positioning in the snap slot and the hook slot, respectively, when the lid is in position on the container, and having a key slot adjacent the snap and hook members. Each of the snap member and the hook member has a cam surface adjacent the key slot for engagement by a key member pushed downward through the key slot to pivot the snap and lock members away from the snap and hook slots, respectively, for removal of the lid from the container. The hook member has an upward and rearward projecting hook adjacent the lower end of the hook member for entering the container hook slot, and the snap member has a rearward projecting shoulder adjacent the lower end of the snap member for entering the container snap slot.