A closure may provide controlled access to at least one opening in a lid. The closure may include an activator coupled to the lid, a cover coupled to the lid, and a connecting member coupled to the activator and the cover. The activator, cover and connecting member may form an over center latching mechanism. In addition, the activator may be connected to the lid about a first axis of rotation, the cover may be connected to the lid about a second axis of rotation, the connecting member may connected to the activator about a third axis of rotation, and the connecting member may be connected to the cover about a fourth axis of rotation. The distance between the first and second axes of rotation may be constant, and the distance between the third and fourth axes of rotation may change as the cover is moved.