A container for enabling fluid flow therethrough for cleaning or sterilisingof the contents, comprises a tray (10) and lid (20) and having respective bases(11, 21) and side walls (17, 27). The bases (11, 21) have perforations (12, 22)defined by elliptically shaped perforation walls (13, 23) with their major axesvertical to allow easy flow of the cleaning fluid through the container and minimumcontact points with the contents or other containers. The internal corners (30)of the perforations (12, 22) in horizontal sections are smoothly curved to minimisedebris or deposits collecting and resisting removal. A method of cleaning orsterilising using the container is also described.
