Print out and assemble your own tetrakaidecahedra, approximate versions of the Kelvin Cell -- a single shape, space-partitioning cell with a minimum intercellular surface area described by Lord Kelvin.
Tetrakaidecahedra pack together to evenly fill a space. Make a whole bunch and fill your cubicle with a papery foam! If your boss protests, just remind him how much paper you are saving over cubes of equal volume. Given enough space, tetrakaidecahedra will practically pay for themselves!