Why bother about last year? The FAQs on the IMR website state what's available:
During the race, PowerBar Performance Bar (Vanilla, Cookies and Cream, Banana flavours), PowerGel (Green Apple, Strawberry Banana, Vanilla) und PowerBar Performance Sportsdrink. There will also be water, Cola, fruit, cake (cake only on the run course) and lots more.
In the Athlete´s Garden) at the Finish lots of food on offer including rolls, salted biscuits, fruit, salad, cake etc. And I'm willing to bet there'll be beer on offer too, never been to a German race that didn't have it.