Smoothies can be stored in the refrigerator for up to 24 hours. Stir well before serving. You can also make your own frozen dragon fruit smoothie packs by placing all of the ingredients, except for the coconut milk, in a freezer bag. They will keep in the freezer for up to 3 months. Just add the coconut milk, along with the contents of the bag, into a blender when you are ready to serve.