Send specimens to the lab for testing in these containers. Individually packaged in peel-pouches to help maintain sterility. OR sterile and individually packaged to guard against cross contamination. Screw-on lid helps keep the contents securely enclosed. Graduations in and cc down the side allow easy measuring. Made of polypropylene. oz. Capacity. 100 per carton. Medline Specimen Containers are sterile, oz. containers with screw-on lid.