Noggin may mean:

A carpentry term. A noggin, or dwang is a short length of material, usually wood, inserted between two studs, joists, rafters or similar to brace a frame or to support a fixture. It is also the term for a brickwork infill-panel in timber frame construction. The article dwang illustrates.
A small drinking cup, often one made from wood and holding about ¼ of a pint. From this also a small drink, especially of an alcoholic liquor; ¼ pint. Example: "Many a noggin of whiskey is here quaffed..."
A unit of liquid measure, usually now of alcohol, equal to one quarter of a pint or a gill, that is either 142mL if using Imperial (British) pints or 118mL if using US pints.
A person's head, English slang usage, corruption of noggen, from Old Low Germanic noc by way of Old English. Technically the latter term is always plural; compare to ox and oxen; brother and brethren, child and children, all of which retain Old English plural terminations. Example: "This thought kept chasing through our noggin." (New York Times).
A lump of cheese in Black Country slang.
A class of proteins. In biology, noggin proteins are a class of proteins that are important in embryonic cellular differentiation.
A famously strong ale brewed by Charles Wells brewery of Bedford, England marketed as Noggin.
A television network. Noggin is a US television network for preschoolers and was a British children's' nostalgia channel.
A book and television character. Noggin the Nog is a character in the eponymous series of books and television programmes made by the UK company Smallfilms.
An abbreviation for the Neuronal Oscillations Group in the Department of Physiology, Anatomy and Genetics at the University of Oxford. Also known as the NOG and Paulsen Lab interested in the cellular basis of information processing in the mammalian brain.

A noggin is a gill which is 4 ounces, so there are 4 gills (or noggins) to a pint.