An inventory storage system including a container with an up-per surface, a lower surface, a back wall and a front wall facing a width of the upper surface and the lower surface, a first removal slot disposed between the front wall and the lower surface, and a pair of sidewalls facing a length of the upper and lower surfaces. The container includes dividers defining one or more sections. The container includes pens stored within the sections of the container, the pens including at least a subset of first pens and a subset of second pens, with the subset of first pens is below the subset of second pens. The container includes spacers that prevent the subset of second pens from exiting the con-tainer via the first removal slot until the subset of first pens exit the container via the first removal slot.

An inventory storage system including a container with an up-per surface, a lower surface, a back wall and a front wall facing a width of the upper surface and the lower surface, a first removal slot disposed between the front wall and the lower surface, and a pair of sidewalls facing a length of the upper and lower surfaces. The container includes dividers defining one or more sections. The container includes pens stored within the sections of the container, the pens including at least a subset of first pens and a subset of second pens, with the subset of first pens is below the subset of second pens. The container includes spacers that prevent the subset of second pens from exiting the con-tainer via the first removal slot until the subset of first pens exit the container via the first removal slot.