Test Tube black filled icon
Test tube with rounded base, wide rim and liquid containing three bubbles
About the Test Tube black filled 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 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.
Get it free as an SVG vector or transparent PNG (16-512px), copy the SVG code, or restyle it in the free online editor — recolor any part, add gold, neon or gradient effects, animate it, or export EPS, PDF and DXF.
Free for personal and commercial use with attribution.
