A means for retaining a resealable bag in an open position for filling purposes is described which includes a surround having an interior dimension less than a nominal width of one side of an unfilled and sealed bag. A pair of cut-outs formed into the surround are shaped and sized to guide edges of a bag during insertion into the surround, retain the upper corners of the bag to prevent axial movement of the bag once inserted, and bias the mouth of the bag in a open position to receive contents.