Duo cheerily investigates the food on the tables closest to them, and takes one of the aforementioned puff things. He also goes for anything that looks like fruit. There's plenty that he recognizes- whoever the original colonists were, they must have taken some flora with them.

When you spend a lot of time in space, you get used to some of the food not being the same as it is planetside. But Duo got spoiled by fresh fruit from Earth, and at Milliways.

Hey look, grapes!