Abstract: The divider is composed of a number of strips, at least one of which extends longitudinally and another of which extends transversely. The strips have slots for interconnecting the strips. Each slot is defined by spaced apart side edges which extend generally vertically from the top edge of the strip to an intermediate portion and which extend further to a terminal portion. Each strip has a thickness which is greater than the distance which separates the side edges of the slot in the intermediate portion but which is less than the distance which separates the side edges of the slot in the terminal portion.