Check out these clever juice box designs by Naoto Fukusawa. He's known for his minimal yet intuitive design approach. Ultimately he designs to avoid the need for instruction manuals or descriptions....they're pretty much idiot proof.
Even though it seems so obvious, to achieve that level of simplicity is easier said than done.

So there's really no need to come up with juice names like "World's Best Real Fruit Juice So You GOTTA Get Some and Drink It and also Your Kids Will Love It and Get Addicted To it...Oh There's also Half Percent of Calcium and Antioxidant and NO TRANSFAT....plus FREE plastic lead toy included!!"
Not necessary.