Specimen containers are sterile, leak-proof polypropylene or glass vessels for safely collecting, transporting, and preserving biological samples like urine (wide-mouth boric acid tubes), stool (spoon-integrated formalin jars), sputum (McCartney bottles), tissue biopsies (10:1 formalin), and swabs (transport media) to labs. Screw caps with O-rings ensure integrity during handling; capacities range 10-500mL with patient labeling. Single-use design prevents cross-contamination while amber variants protect photosensitive analytes. Durable, shatter-resistant materials maintain sample viability for accurate diagnostics across hematology, microbiology, cytology, and pathology workflows.