Suction cup
![The pressure on a suction cup as exerted by collisions of gas molecules holds the suction cup in contact with the surface.](/Images/godic/202502/14/Suction_cup_pressure_from_collisions.svg0928.png")
![One cup suction lifter.](/Images/godic/202502/14/Suction-lifter-one-cup0928.jpg")
![SatNav devices often ship with suction cup holders for mounting on windscreens.](/Images/godic/202502/14/Mobiles_Navigationsgeraet_Navigon_im_Einsatz0928.JPG")
![GoPro camera attached to car with suction cup](/Images/godic/202502/14/GoPro_camera_mounted_on_car0928.jpg")
A suction cup, also known as a sucker, is an object that uses the negative fluid pressure of air or water to adhere to nonporous surfaces, creating a partial vacuum.
Suction cups are anatomical traits of some animals such as octopuses and squids, and have been reproduced artificially for numerous purposes.