For a stronger mint flavor, add more leaves when muddling.
Replace simple syrup with honey for a different sweetness.
Make it non-alcoholic by skipping the vodka and adding soda water.
Prepare watermelon juice ahead of time and chill for faster serving.
Freeze cubed watermelon to use instead of ice for a more intense flavor.
Always drink responsibly and enjoy in moderation. This cocktail is best served fresh, but you can store leftover watermelon juice in the fridge for up to 2 days.