Pronounced "Four X", around half of the pubs in Queensland are branded as XXXX, meaning it is available on tap. There are several varieties of XXXX.
XXXX Gold is a mid strength beer, containing 3.5% alcohol. Found in longneck (750ml), stubbies (375ml), cans (375ml) and bottles (250ml).
XXXX Bitter is a full strength beer, containing 4.8% alcohol. Found in longneck (750ml), stubbies (375ml), cans (375ml) and bottles (250ml).
There is also a special brew of XXXX Bitter, with 6.5% alcohol, available only in stubbies.
XXXX Draught is a draught beer (obviously), containing 4.5% alcohol, and found in longneck (750ml) and stubbies (375ml).
XXXX Light only contains 2.3% alcohol, found only in stubbies and cans.
Finally, XXXX Diet Lager is a low carb beer, containing 4.4% alcohol. Found in stubbie form only.
Official site: http://www.xxxx.com.au/