Test Tube with Blue Liquid and Bubbles - Science Lab Illustration #3894499 (License: Personal Use)

This vector illustration depicts a classic laboratory test tube filled with a gradient blue liquid, featuring three white circular bubbles rising through the solution. Dark horizontal lines suggest measurement markings on the tube’s side, while the bold black outline enhances visibility and contrast for digital use. The image conveys active experimentation or a positive reaction outcome.

Used on educational websites, science blogs, chemistry tutorials, or infographics to visually represent experiments, reactions, or lab procedures. Matches user intent for visual aids in STEM learning materials.