Because we don't all have the same popsicle mold (you can get mine from amazon here) it can be tricky to know how much to make in advance. Before making the smoothie pour water into your popsicle molds 1 cup at a time. My molds hold about 4 cups of liquid. ALSO If  adding fresh fruit then you don't need to make as much. But now I have a good idea on how much to make. This peaches and cream smoothie popsicle recipe makes 4 cups. If you have extra serve to your kids as a drink!