The rum swizzle is considered by some to be the national drink of Bermuda, though others claim it is the dark 'n' stormy. My recipe, from The New York Bartender's Guide, combines dark rum with lime juice, Angostura bitters, sugar and sparkling water. Drinks described as swizzles date as far back as the mid-18th century. The swizzle stick was named for the beverage.
For us, the drink was a vehicle for the Mad River First Run Rum we got as part of our Advent adventures (see here). The lime juice supplies most of the flavor but the rum does bring a pleasant warmth to the party.