Saveur reconstructed this recipe for the cuba kola, based on the one served at ray buhens long-running tiki-ti restaurant in la. Its a refreshing, straightforward tiki drink with a touch of added mystery from the anise liqueur. Overproof demerara rum can be difficult to find. The classic choice is lemon hart, but it has recently undergone a reformulation and for a time appeared to disappear from the market entirely. Hamilton 151 is a good substitute. Saveur recommends a dark jamaican rum. Jamaican rums tend to be more interesting and aromatic, and are a good choice for complex tropical cocktails where a more neutral rum flavor might be lost among all the other strongly-flavored ingredients.