Biological centrifuge tubes and bottles are essential labware designed for the separation, purification, and processing of biological samples in centrifugation. These products are typically made from durable materials like polypropylene (PP) or polycarbonate (PC), ensuring chemical resistance and high-speed compatibility. Common types include conical-bottom tubes for pellet collection, flat-top tubes for easy stacking, and sterile options for cell culture. Bottles may feature screw caps or sealing rings for leak-proof containment. Key applications involve DNA/RNA extraction, cell harvesting, and protein purification. Variations include products like 15/50mL conical tubes, microcentrifuge tubes (0.2/1.5/2.0mL), and high-capacity centrifuge bottles (250-1000mL), often marked with graduations for volume measurement.