I've found that the parks have no to-go packaging, but every resort we've stayed at does. You have to ask for it though. The kids meals are usually served in those mickey-shaped plastic sectioned containers, and they have clear mickey covers for them. Adults usually have the black oval containers with the clear covers.
My dd and I often share cs lunches, so we had quite a few cs credits left over from our 10 night stay this summer. We had our last day's breakfast at Boma, and staked out the Mara for people who were going to pay with cash, and we 'paid' for thier meals. There was another woman there doing the same thing..lol. My dd had a ball doing this!
We paid for the DP and I couldn't see all of those credits going to waste. We stayed club level and had breakfast and snacks always available. We would take some fruit with us to the parks too.. we didn't eat many cs meals at all, and when we did we'd usually share. We had 12 CS credits left.
We didn't 'donate' all the credits, we went home with LOTS of mickey rice crispies treats too..lol.