Disclosed herein are various embodiments of a display unit with built-in, hollow vertical supports that are formed out of a single sheet of material. As one example, a display unit having a plurality of built-in, hollow vertical supports for supporting one or more shelves is provided. The display unit includes: a first single sheet of material folded into: (i) a plurality of vertical panels; and (ii) a first set of built-in, hollow vertical supports of the plurality of built-in, hollow vertical supports, wherein each built-in, hollow vertical support contacts one or more of the plurality of vertical panels; and a first shelf of the one or more shelves disposed within the frame and supported by each built-in, hollow vertical support of the first set of built-in, hollow vertical supports.