A pipette filler is a laboratory tool used to fill pipettes with liquids. It typically consists of a rubber bulb or pipette filler pump that is attached to a pipette via a plastic or glass pipette adapter. The rubber bulb is squeezed to create a vacuum, which draws liquid into the pipette. The pipette filler is designed to be easy to use and helps to prevent spills and contamination of the liquid being transferred.

Rubber pipette fillers are a common type of pipette filler and are often preferred for their durability and resistance to chemicals. They are also available in different sizes to fit different types of pipettes.