Chocolate milk is universal. However, the way chocolate milk is made or bought isn't. In many places, bottled chocolate like Nestle is not available, so people make it the old fashioned way: with cocoa powder and milk. When I was growing up, this is the way we made it. There was no chocolate syrup bottles looming in the 'fridge or bottle of it from the dairy case and man, was it good!
Take my advice and take the chocolate milk challenge (yes, just like the Pepsi Challenge!) . I bet you will choose the homemade over the store bought any day. How to make your own chocolate milk.