1.) In a mixing glass, or blender, combine the rum, lime juice, blueberries, and blueberry syrup.

2.) If serving on the rocks cover the liquid in the mixing glass with ice, cover the filled glass with a shaking tin, and shake for ten seconds; strain over fresh ice in a rocks glass.

3.) If serving frozen, fill your blender with twice as much ice as liquid and pulse until blended to your liking and serve in a Collins glass.

4.) Garnish your glass with a lime wedge and enjoy!