Test Tube black outline icon
Outline test tube half filled with liquid, bubbles inside and two bubbles rising above the rim
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About the Test Tube black outline icon
This icon shows a single round-bottom test tube with a thick collar rim, filled about halfway with liquid whose surface curves in a soft wave, plus small bubbles inside the glass and two escaping above the mouth. It reads instantly as experiment, sample and chemical reaction, making it useful for laboratory dashboards, medical test result pages, chemistry course material, pharmacology product sheets and science infographics.
The tall vertical body with its rounded base gives the shape a stable silhouette, while the separated cap-like rim and scattered bubble dots break up the long stroke and keep it legible when scaled down. It sits well beside flask, microscope and pipette icons from the same set; at 16 px drop the smallest bubbles so the liquid line stays readable.
This is the black outline version of the test tube icon: even, monoline strokes that stay crisp at small sizes and suit clean, minimal interfaces, wireframes and light backgrounds.
Download it free as a scalable SVG vector or transparent-background PNG in seven sizes (16 to 512px), copy the SVG code straight into your project, or open it in the free online editor to change colors, apply gold, silver, neon and gradient styles, animate it, or convert it to EPS, PDF and DXF.
Free for personal and commercial use with attribution.
