breast pump
A device designed to assist in lactation among human mothers for the purpose of filling bottles with milk for their children using suction.
Milking machine is a more generic term for devices to induce lactation among any animal. All breast pumps are milking machines, but if it is not for humans, (such as the especially popular cow milking machine) it's not a breast pump, but is a milking machine.
Danbooru post #1715415 is an example of a breast pump. Danbooru post #97533 is a generic milking machine.
Body Suction Devices
- breast enlargement pump (a similar device designed for a different purpose)
- clitoris pump
- milking machine
- penis pump
This tag implicates milking_machine (learn more).