You can use any type of fruit or low fat Yoplait Source yogurt, it's up to you, but this concoction I've listed below is great.
You can either make it a bit thicker or you can blend it longer to make it thinner and easier to suck up a straw.. I like to eat some of it with a spoon, and suck some of it up with a straw.. haha!
1 small banana (sliced)
1 cup frozen strawberries
1/2 cup ice
1/2 cup Yoplait Source Exotik Collection - Pineapple-Coconut-Banana yogurt
2 tbsp splenda
Put the fruit into a long tall tupperware or something similar, top with ice and yogurt (make sure to pour the yogurt on top).
Using an immersion hand blender, start to slowly pulse the mixture not forcing the blender (you don't want to damage it) but blending it longer and longer as the mixture begins to break down and blend easier. Once it starts to get smooth, add the splenda and continue to blend well.
Blend the mixture until it's to your desired thickness, pour it into your serving dish or cup and top with a frozen strawberry.