Grab a tall glass and fill it about halfway with ice cubes. If your cola is already well chilled, you can use less ice.

Pour the grenadine over the ice. Start with about 1 to 2 tablespoons, depending on how sweet and fruity you want your drink.

Slowly add about 8 ounces of chilled Coca-Cola. Pouring it gently helps preserve some of those refreshing bubbles.

Use a spoon to gently mix the grenadine and cola together. You don't need to stir vigorously because you don't want to lose too much carbonation.

Finish with one or two maraschino cherries. Then serve immediately and enjoy!