There's a certain segment of McDonald's customers who keep coming back for the restaurant chain's signature sweet tea.

McDonald’s has extended its $5 and $6 Value Meal promotions. The $5 deal includes a choice of McChicken or McDouble burger, four-piece Chicken McNuggets, small fries and a small soft drink.

But foodies will only be able to pick up the Irish-themed drink from March 12 until March 25. McDonald's said it will donate 20p from each sale of the drink at selected restaurants to the Ronald ...