The present disclosure includes methods, devices, modules, and systems for operating memory cells. The passageway may include at least one sump and may have a depth that inclines from a first to a second end. The actuator is configured to advance such that the paint ball advance assembly, coupled to the actuator, moves in response to movement by the actuator. A dip tube may be disposable within a container and affixed to the spindle for rotation with the spindle.