Bags and sacks for packaging, storage and transport; sacks for the transport and storage of materials in bulk; disposable bulk container liners; bags for bulk containers; liners for use in bulk containers; flexible intermediate bulk containers [sacks] for transporting materials; flexible intermediate bulk containers [sacks] for transporting pulverulent materials; flexible intermediate bulk containers [sacks] for transporting particulate materials; plastic liners for the transport of bulk material in containers; plastic liners for the storage of bulk material in containers