A shipping container convertible to a display case and formed from a one-piece blank of sheet material. The container comprises an upper front panel, first, second, and third main panels, and a lower front panel connected in series at respective fold lines. Upper front side flaps foldably joined to the upper front panel comprise a respective one of a first removable section and a second removable section each defined between respective pairs of separation lines. The first removable section extends across only a portion of a first end of the container, and the second removable section extends across only a portion of the second end. A lid portion of the shipping container is completely detachable from a base portion of the shipping container by removing the first and second removable sections and separating the lid and base portions along a separation line.