A lens and cartridge packaging system and method of use which simplify the removal and transfer of an IOL to an IOL insertion device is disclosed. A first clocked counter circuit is connected to the comparator to increase or decrease the value of the first clocked counter depending on the digital value supplied from the comparator. Moreover, the present invention provides a barrier device that, in its preferred form, also provides a structure that enables a hook like tool to engage and manipulate the coupled barrier device and cover, while maintaining the barrier against ingress of dirt, debris, animals, etc. hanging the unfolded multi-chamber container on the device, and the like. The fueling device 10 has high sealing property against large external forces applied to the upper part of fuel filler pipe. The present invention also provides a corresponding sound output device for hearing protection.