What could happen to grapes in 9 hours except that they might warm up to room temperature (which will make them taste better)? We're talking about uncut fruit, not a tuna sandwich.

As for sippy cup liquids, it sounds as though you will, as a parent accompanying a toddler, get more latitude regarding liquids - but that those liquids should be in manufacturer-sealed containers prior to completing the security screening process. In other words: (1) empty sippy cup ok; (2) juice box or other sealed container of liquid probably ok; but (3) sippy cup with liquid in it (during security screening) not ok. Bring the sippy cup with liquid to the airport if your toddler needs it before security, pour it out before security and re-fill the sippy cup after you exit security.