Has anyone ever had "BLUE COW"?? Its a type of drink?

My friend had it and its from 7-11. They're advertising it big time and he said they taste like cake batter, but made him feel really good. I'm wondering what they put in it to do that

?2006-09-26T15:28:48Z

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don't know, so I'm going to 7-11 as soon as I get off here to check it out.