Test Tube with Blue Liquid - Scientific Lab Illustration #3340852 (License: Personal Use)

This vector-style illustration depicts a standard laboratory test tube with a threaded screw cap and measurement markings. The tube contains a vibrant blue liquid filling approximately 40% of its volume, suggesting a reagent, dye, or sample solution. The minimalist black-and-white outline with colored fill emphasizes clarity and scientific accuracy.

Used on educational websites, lab equipment catalogs, science infographics, or health-related articles to visually convey concepts like sample collection, chemical testing, or microbiology. Matches user intent for quick visual reference or iconography in STEM content.