Abstract: A kettle keg for brewing and dispensing beer comprises a container having a bottom and upright sidewalls defining a chamber configured to receive a fermenting liquid. A compression displacement plate is slidably received within the container and between the upright sidewalls and configured to rest on a top surface of liquid received in the container to define an adjustable volume of the chamber. A dispensing port is in fluid communication with the chamber. Means for forcing the compression displacement plate against the top surface of the liquid create a motive force of the liquid toward the dispensing port.