From the DDP pdf:
Certain items are not included in any Disney dining plan such as: • Alcoholic beverages • Items that are more than a single serving (such as a box of doughnuts or a jar of peanut butter) • Items (such as popcorn or drinks) that are served in a souvenir container • Items sold from recreational rental counters • Items considered to be merchandise (such as bottle toppers, glow cubes and bottle straps) • Special dining events offered at certain Table-Service locations