-Cut 1 watermelon into ½ inch chunks (easier to blend when frozen).
-Put cut watermelon on a cookie sheet and place in freezer and freeze solid, about 1-2 hours.
-Remove watermelon and place in a plastic bag, keep in the freezer until ready to mix your drinks.
-Place the following ingredients in your blender:
3 TBS fresh lime juice
6 ounces silver tequila
2 ounces Cointreau or triple sec
1.5 cups water
2.5 cups frozen watermelon
-Puree until smooth.
-Garnish with a watermelon wedge if you wish.