Abstract: The present invention is directed to a collapsible drum for transporting materials. The present invention solves problems associated with reusing and efficiently transporting shipping containers designed for retaining bulk materials, including hazardous substances, and insuring reliable structural integrity with every use. The collapsible drum of the present invention is adapted for integration with standard handling equipment, and has a permanently secured, collapsible drum floor and fluted sidewalls that enable an operator to collapse and roll the empty drum into a compact tube. The collapsible drum provides one or more removable, ribbed disc-shaped inserts for reinforcing the drum floor and/or drum lid.