To make ahead: Cover and refrigerate the margarita mix (Step 2) for up to 2 days.
To make your own simple syrup: Bring 1 cup sugar and 1 cup water to a boil in a medium saucepan, stirring frequently to dissolve the sugar. Let cool for 30 minutes and then refrigerate until cold, at least 1 hour. Makes about 1 1/2 cups.
1 alcohol equivalent, 1/2 fruit