According to the O/U, ALL Paper Cups and Plates are acceptable for use on Pesach without a special Kosher for Pesach certification for both hot and cold foods.
From The COR of Greater Detroit: Newly Certified Sodas
The following new Sodas are Kosher/pareve with no symbol required… Mountain Dew Baja Point Break Punch Mountain Dew Baja Laguna Lemonade Canada Dry “Fruit Splash”