In years past I tried to photograph every food menu at the park but that has become nearly impossible. So to give you an idea of what food and drink costs in the park, here is a gallery of photos of menus from various locations. Click on them to make them larger.
The souvenir cup for 2013 is $8.59 plus tax and refills are .99 each plus tax (less if you have a season pass.) The meal tickets this year are updated to include a break off piece if you want to get your cup separate from your meal. Here is a photo of it. You can see all the meals that are listed for both the regular and food allergies (dietary meal) versions of the tickets on the Hersheypark website here. (If you want to know if they are a good value, check out my post on that topic here.)
One thing to note – water is free at Hersheypark whether or not you have a souvenir cup. Go up to any stand that sells fountain soda and ask for a cup of water and you will get a cup with ice and water in it for free. You do not have to pay a thing to stay hydrated at Hersheypark. If someone finds this to be untrue, please let me know. I have never been refused.