A dressing drum is a cylindrical, stainless steel container used in medical settings to store and sterilize dressings, surgical instruments, and other medical supplies. It has a secure lid with clamps or locks to maintain sterility after autoclaving. Perforations in the drum allow steam to penetrate during the sterilization process, ensuring all contents are properly disinfected. Dressing drums are essential in maintaining hygiene and preventing infections in clinical environments.