Abstract: An elongate flexible container, made of a textile fabric and having at least one filling opening. The container is filled with solid material, such as sand or other ground material, for the formation of a body adapted for use as a core or base of a dam, a quay, a bank reinforcement, a jetty or a breakwater, or for filling holes or trenches, or for use at the bed of a waterway, or for the packaging and storage of contaminated material. The container is provided at its upper side with at least one filling opening. The container includes stitching extending in the longitudinal direction of the container and mutually connecting facing edges of the textile fabric.