Simpson, married to his childhood sweetheart for almost 19 years, had walked out on his wife and kids and into the arms of a younger woman. The breakup surprised his wife, his friends and even Simpson himself. Looking back, he says, it was a classic midlife crisis.
In that we have already provided the definitive answer to this question elsewhere (relying on rum extract), we assume your follow-up is seeking a non-alcoholic substitute for rum (as extracts can be as alcoholic as or more alcoholic than the spirits they replace).
Like other extracts, rum extract keeps essentially indefinitely as long as it is stored in a cool, dry place out of the light. There are two basic kinds of rum extract: natural, and imitation. The natural type is made with real rum, and it has a full, rich, complex flavor much like that of actual rum. Imitation versions are made with artificial ingredients, and tend to have a much simpler, less interesting flavor.