A Pasteur pipette is laboratory equipment used for transferring small volumes of liquid. It is made of glass or plastic and has a thin, elongated stem and a rounded bulb at one end that creates a vacuum when squeezed. The vacuum allows the user to draw liquid into the pipette and dispense it precisely.

Pasteur pipettes are commonly used in laboratory settings for tasks such as adding a small amount of reagent to a solution, transferring a sample, or measuring a specific volume of liquid. They are also used in biology and medical applications for transferring and dispensing liquids.