Abstract: The closure adapted to cover a container aperture defines a retention projection dimensioned to be received in a retention aperture in a wall of the container. An insertion surface on the projection avoids the closure being impeded by an edge of the wall. The projection defines a disengagement surface to remove the projection from the retention aperture and defines a registering surface opposite the registering surface. The closure may be fitted agnostic to the rotational alignment of the closure relative to wall and then twisted relative to the container until resistance is provided by the registering surfaces engaging Automated closure requires only two degrees of movement and only two force sensors.