A space saving box and a box useful for pizza and other relatively flat food products is provided. The box generally includes a one piece cardboard or paperboard blank having a first portion hingedly connected to a second portion. The blank is structured to include various score lines such that first and second portions are formable into a full sized pizza box. In addition, the blank is structured such that, when separated from the second portion, the first portion is formable into a reduced sized, space saving box having a tapering depth, for facilitating storage of leftover pizza slices, for example.