You know what's infinitely better than a carton of Tropicana? A carton of boozy Tropicana, of course. And if you've got $10 and two days, Spike Your Juice's magic powder will make that happen.
The process of getting from juice to happy juice is stupid simple: take a 64 oz. bottle of your favorite juice (recommended: grape, cranberry, or pomegranate) with a minimum sugar content of 20g/serving and none of that unfiltered or artificial sweetener junk. Then pour in a Spike Your Juice packet (that $10 will score you six of them), seal the bottle with the supplied airlock, and sit patiently.
I know, I know, you're worried it won't taste good. And it may not! But you can adjust the potency/dryness the potable with how long you leave the cap on. Besides, if you've got 64 oz. of the stuff, you won't care about the taste by the time you hit the bottom.