|2 fl oz||Bacardi Carta Blanca light rum|
|1⁄2 unit||Guinness stout|
|Top up with||Cola|
Difford's Guide remains free-to-use thanks to the support of the brands in red above.
Something of a student drink, this tastes better than it sounds.
Thought to have originated in Stirling, Scotland, during the late 1990s.