Ergonomic packs for production supply

An apparatus is disclosed for providing easier, more ergonomic access to parts stored in a shipping container to be used in a manufacturing environment. Shipping containers having trays with packaging cells for containing production parts may be accessed by a person whose responsibility it is to remove the parts from the container for use on an assembly line, for example. By enabling the trays containing packaging cells to be moved forward as parts are removed from the container, the person's job is rendered easier to access parts that would have otherwise remained at the rear of the container. In a preferred embodiment, the packaging cells or packs are arranged to slidably move closer to the person removing the parts.