Harris says apple dippers and milk may be featured in McDonald's Happy Meal ads, but they're often pictured in the background.

McDonald's allows parents to swap milk or juice for soda in its Happy Meals. It also offers sliced apples with caramel sauce and chicken nuggets as alternatives to French fries and hamburgers.

The sun is shining brightly, the water is clear; Milk is sweet, cake-yes; Young is happy, and he is sweet ……is my sincere wish and hope that you are happy National Day!