An apparatus for storing fluid containing bags comprising a shelf having a bag-supporting surface, and a pair of laterally extending projections. The device includes a pair of opposed sidewalls each comprising an inner surface, and a longitudinal groove for receiving one of said projections. The groove is disposed in the inner surface. A first support for supporting one of the projections in a first shelf position is disposed within the groove, and a second support for supporting one of the projections in a second shelf position is disposed within the groove. The shelf is disposed between the sidewalls such that each of the projections is disposed within a corresponding groove. The shelf is movable from the first shelf position wherein each of the projections is supported by a corresponding first support and the second shelf position wherein each of the projections is supported by a corresponding second support.