Lemon Hart 151 Rum.
For most people, the numeral "151" instantly brings Bacardi rum to mind. But true tiki-cocktail connoisseurs associate the high-proof moniker with Lemon Hart 151. Punnily named for early 19th-century British rum merchant Lehman Hart, Lemon Hart 151 is made from a blend of high-proof Demerara rums that are colored with caramel and aged in Guyana. It has a heavy, complex taste with layers that include hints of burnt sugar and molasses but also tropical fruits, cinnamon, baked apples, and toasted oak. Thanks to such a wide variety of bold flavors, Lemon Hart blends well with most fruit juices and sweet liqueurs, so don't hesitate to experiment with your favorite summer cocktail. [$40; lemonhartrum.com]