Test Tube black filled icon

About the Test Tube black filled icon

This icon shows a narrow test tube with a flared rim at the top, a rounded base and a wavy liquid line about a third down, with several round bubbles floating inside the sample. It reads instantly as chemistry, laboratory testing and scientific measurement. Use it for lab result dashboards, clinical testing pages, pharmacology and biology course material, science app navigation, or research report slides.

Composition is tall and vertical: the straight walls give it a strong stem shape, while the varied bubble sizes keep the interior from looking empty and signal an active reaction. It pairs naturally with beaker, microscope and flask icons from the same set. At small sizes the smallest bubble can disappear, so use it at 24px or larger.

This is the solid black filled version of the test tube icon: a bold silhouette that reads clearly at 16-24 px and on dark or busy backgrounds, and prints well in one colour.

It downloads free as an SVG vector or transparent PNG in seven sizes, and the free online editor lets you recolor it, apply gold, silver, neon and gradient styles, add animation, or convert it to EPS, PDF and DXF.

Free for personal and commercial use with attribution.