In all seriousness grape juice, I fucking love grape juice! I drink it quite litterally by the gallon, my friends have become used to seeing me walk around all day with a huge bottle of grape juice taking swigs whenever the mood strikes me.
I buy my grape juice in bulk, I go to Sam's Club and buy about 15 94 oz bottles ever couple of weeks, I prefer 100% Concord Grape juice but every once in a while I'll go with White Grape.
I will NEVER drink a grape flavored juice product or a watered down kiddy juice, to do so would be to insult the noblest of all fruits, I will only drink 100% juice that comes from only the finest crushed grapes that are probably grown by the Welches company.