I know I blogged about this last summer, but just in case you didn't read it... ('cuz it's a great idea, I think)... Don't toss your leftover fruit smoothie mix down the drain... turn it into homemade Popsicles!!!
Here's a recipe that I sort of follow along with (I just toss stuff in the blender and call it good)
2 cups fresh or frozen strawberries
1 cup plain yogurt
1/2 cup granulated sugar
Puree like the watermelon and freeze, insert sticks when partially frozen and continue to freeze until they harden (Overnight is good).