- 12 leaves mint
- 2 lime slices
- 1 teaspoon white sugar, or more to taste
- 1/4 cup ice cubes, or as needed
- 1 (1.5 fluid ounce) jigger rum (such as Bacardi)
- 4 1/2 ounces diet lemon-lime soda (such as Diet Sprite)
Place mint leaves, lime slice, and sugar in bottom of a glass and muddle with a spoon until mint is crushed. Fill glass with ice cubes. Pour rum and soda over the ice; stir.