9 oz Sprite, 7UP, Squirt
.5 oz Grenadine
1-2 oz Orange Juice
Fill up a champagne flute halfway with Sprite/etc, then add in Expedition Rum, grenadine and top with Orange Juice. Enjoy!
This cocktail is a variation on the Jean Lafitte drink created by Adam Larkin. It is basically the same drink, only substituting a citrusy soda like Sprite or 7UP instead of sparkling wine.