Green’s Dictionary of Slang

(Aus.) an extra-large beer bottle: introduced in 1958 at 80 fl.oz (2.25 litres); cit. 1975 refers to US fl.oz.

1970		Western Herald (Bourke, NSW) 28 Aug. 1/6: Photographed is what is commonly called a ‘Darwin Stubby’ and for comparison the conventional D.A. Stubby used in N.S.W.
1975		Bulletin (Sydney) 28 June 66/1: Oddly enough all the tasters were keen on the NT Draught. This came in a 76 oz bottle, a true whopper, lovingly known in the North as the Darwin Stubbie.
1982		Canberra Times (ACT) 20 May 3/1: While beer-can regattas and Darwin stubbies could be fun, he said [...] the true perspective was that booze caused 70 per cent of fatal road accidents.
1992		R.G. Barrett Davo’s Little Something 93[H]e moved on to a story about a Brahman bull in the Northern Territory that could drink a Darwin stubbie in fifteen seconds: .