"That's okay," There's no disappointment, or anything. They really need to work out where the Terrans are similar to Cybertronians and where they differ. Perhaps she just hasn't worked out how to access it yet. It's not extremely important, anyway. Optimus makes a mental note to make sure they attend the medibay for a check up, at any rate. "I have had soda before. Just not for a long time."

They don't really have the resources for nice things like that on Earth, and he's actually not all that sure how you'd go about carbonating Energon on a level that large. Along the way, he figures he'll get an excuse to ask her a few things that have been bothering him. Starting not at least with; "How are you finding life on the ship? Have you visited the observation room at all?"