I made another juice the other day which was yummy plus a way to use up an overripe banana. The recipe was from reFresh, a Canadian restaurant cookbook with a juice emphasis. I think you could make it with boughten apple juice, if you didn't feel like getting out and then washing your juicer, with results almost as good.
Juice 4 smallish apples, a 1/2" piece of ginger, and 1/2 a peeled lemon, yielding about 500ml of juice (or use premade apple juice, and squeeze the lemon in, and grate the ginger and squeeze the juice trough a little cloth). Run it through the blender with an old, blackened banana and a big pinch of cinnamon, then heat it on the stove till it's a nice temperature (or, if you have a hippie blender, you could just blend till it gets hot and save washing a pan).