Mix the mint syrup, lime juice and white rim in a pitcher. Cover the pitcher, refrigerate until ready to serve. Measure ¾ cup of the mixture into a glass of ice, top with sparkling water, garnish with a mint sprig and lime and enjoy!
*To make the Mint Syrup: Dissolve 2 cups of sugar in with 2 cups of boiling water and throw in about 2 cups of mint sprigs. Cool the mixture, strain, and it will keep in the refrigerator for up to a month (if it lasts that long).