Start by emptying the liquor bottle into a pitcher or large container.
Add the fresh lemon juice, simple syrup, cranberry juice, and soda water to the container.
Stir the mixture well until all the ingredients are combined.
Fill the empty liquor bottle with ice cubes.
Pour the mixed cocktail back into the bottle, filling it up to the top.
Place the bottle in the refrigerator and let it chill for at least 1 hour.
Once chilled, remove the bottle from the refrigerator and give it a gentle shake to mix the flavors.
Take a coupe or highball glass and fill it with ice cubes.
Open the bottle and pour the cocktail directly into the glass.
Garnish with a lemon slice and fresh mint leaves.
Stir gently with a cocktail stirrer or straw, if desired. Serve and enjoy!