A system for storing biopharmaceutical materials includes a plurality of flexible walls bounding an interior for holding biopharmaceutical materials therein. At least one port is connected to a first wall of the walls and provides fluid communication between the interior and an exterior to allow a draining of the interior. A collapsible conduit includes a plurality of perforations along the conduit. The plurality of perforations is configured to allow flow of the biopharmaceutical materials from the exterior to the interior of the conduit. The conduit has a cross-sectional area transverse to a length of the conduit and the conduit extends from one of the at least one port toward an opposite end of the interior. The conduit is collapsible by the flexible walls and forms a reduced cross-sectional area to allow a flow of the biopharmaceutical materials through and/or along the conduit to the port.