Koktail Semangka-Tequila

Bahan-bahan (8 porsi)

• ¼ cup water
• ¼ cup granulated sugar
• 8 cups seedless watermelon (diced)
• ¼ cup fresh lime juice
• 3 calamansi limes (juice only, optional)
• ½ cup lightly packed fresh mint leaves (plus 8 sprigs for garnish)
• 1¼ cups silver tequila
• ice