In medium saucepan, add the coconut water, water, dark rum, coconut rum, granulated sugar, Coco Lopez, lime juice and zest, and mint leaves. Bring to a boil over high heat. Reduce the heat to medium/low and allow the mixture to simmer until the sugar is reduced and the sugar is dissolved, about 10-15 minutes. Remove from heat and allow the mixture to come to room temperature. Strain the mixture into a glass container with a tight-fitting lid. Discard the solids. Store in the fridge until ready to use.