A droplet of liquid falling from a tilted glass test tube.

Liquid Drop From Tube

A man wearing a lab coat and boots, looking at and holding a test tube with liquid inside in one hand, smiling and facing side while standing.

Man In Safety Glasses And Lab Coat Holding Test Tube And Standing

A pill bottle, medicine flask, test tube or vial with a label and a thick rim.

A computer monitor and test tubes on a desk.

A rack with three identical test tubes with the same amount of liquid in each.

A lab test tube with liquid and measuring lines.