If using a highspeed blender (like a Vitamix) combine all ingredients and mix at medium speed until vegetables are liquefied. Add ice cubes to blend to desired consistency. Serve immediately.
If using a regular blender ensure celery, apple, and cucumber are chopped and add ingredients in batches. Start with the juice/water then add a vegetable at a time until all ingredients are combined. Mix thoroughly then add ice cubes until you reach the desired consistency. Serve immediately.