Bitters for Rum SetGet down to the island vibrations with these bitters to spice up your rum drinks! Whether mixed in a baroque tiki monstrosity or a simple, no frills old fashioned, these are some of our favorites to make just about any rum shine. Bittercube's Jamaican No. 1 bitters combine black pepper, ginger, allspice, and grapefruit for a nice substitute for your standard aromatic bitters. Bittermen's Elemakule Tiki bitters is a tropical blend of cinnamon,