Take a medium sized sauce pan, pour two cups of water into it, and set it on the stove over medium-high heat. Meanwhile, place your serving glasses in the refrigerator to allow them to chill.
Once the water is hot enough, but not boiling, add two cinnamon sticks and four whole cloves to it.
Then, add two whole allspices, and leave it to simmer for five minutes.
After five minutes, strain the mixture, discard the spices, and set the liquid aside to cool.
Just before serving, take the chilled cocktail glasses out of the refrigerator and add ice cubes to them.
Pour the cooled spice mixture, sparkling white grape juice cocktail, and lemonade concentrate into the glasses, dividing the liquids among the glasses in equal proportions.
Float thin lemon slices on top of each glass, and serve immediately.