A rubber bulb teat is a small, flexible instrument used in laboratories for dispensing liquids. It is made from rubber and has a bulb-shaped reservoir at one end that is connected to a narrow tube or pipette at the other end. The teat can be compressed or squeezed to draw in a liquid and then released to dispense the liquid in drops or a stream.

Rubber bulb teats are commonly used in chemistry and biology laboratories for transferring small volumes of liquid or for adding reagents to a solution dropwise. They are also commonly used in medical settings for dispensing medicines or for feeding infants.

Rubber bulb teats are preferred over other types of dispensers, such as glass pipettes or plastic syringes because they are less likely to break or contaminate the liquid being dispensed. They are also inexpensive and easy to use, making them a versatile and convenient tool for laboratory work. However, they may not be suitable for applications that require precise measurement or control of the liquid volume.