01 -
Divide 12 ounces (1 1/2 cups) Coca-Cola among ice cube trays. Freeze until solid, 3 to 4 hours.
02 -
Into a blender, pour lime juice, bourbon (if using), and remaining 16 ounces (2 cups) Coca-Cola (or 1 1/2 cups if using bourbon), then add Coca-Cola ice cubes and frozen cherries. Blend, scraping down sides if needed, until smooth and icy, 1 to 2 minutes.
03 -
Divide the slushie among chilled glasses. Garnish each glass with a lime wheel and maraschino cherries, if desired.