Test Tube black outline icon

About the Test Tube black outline icon

A tall narrow tube with a rounded base and a thick rounded rim at the top holds liquid marked by a wavy surface line, with three small circles floating as bubbles below it. The drawing signals experiments, sampling, chemical reactions and diagnostics, so it suits laboratory software, medical test booking flows, chemistry lesson slides, research reports and biotech websites.

The rim reads as a separate capsule shape wider than the body, which makes the tube instantly recognizable at a glance, and the staggered bubbles break the empty interior. It pairs naturally with beaker, microscope and flask icons from the same set. Use at 24 px or larger so the bubbles stay distinct.

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.