Lab Test Tube with Blue Liquid - Scientific Equipment Illustration #3877777 (License: Personal Use)

This vector-style illustration depicts a conical-bottom polypropylene test tube with graduated volume markings (0-5 mL), sealed with an orange ribbed screw cap. The tube contains a translucent light blue liquid, suggesting a buffered solution, reagent, or biological sample. Its clean, schematic design emphasizes clarity for instructional or technical documentation.

Used on educational websites, lab supply catalogs, scientific articles, or health-related pages to represent sample collection, chemical assays, or diagnostic procedures; matches user intent for visual learning or product identification.