Abstract: A lock system for a container with a movable closure or lid. The lock system includes a pivotally mounted latch member, a corresponding rigid latch member which interlocks with the pivoting latch member when the closure is closed, and a push-button lock mechanism having a shoulder portion which engages and displaces the pivoting latch member, thereby permitting the closure to be opened, when the lock mechanism is in its "unlocked" position and the push-button is depressed. The pivoting latch member includes a pair of plates slideably coupled to one another, one pivotally mounted in the container and the other supporting a cross-member which engages the rigid latch member. The pivoting latch member has a slot through which the shoulder portion of the lock mechanism passes (without engaging or displacing the latch member) when the lock mechanism is "locked".