What do The Moons drink?

Beckett received this new Thomas oil car in his Easter basket.

I don't know if you can tell from the picture but it has liquid inside that sloshes around so it looks like a real oil car.

He was playing in the corner last night and Chris and I noticed what he was saying in the midst of all his kid chatter, "It's Diet Coke. I'm the Diet Coke guy." We were confused until we realized that he was playing with the oil car. I guess in his Thomas world it's the Diet Coke car. Who wants to drink oil? Of course, who wants to drink Diet Coke? We are a Coke Zero family. Oh well, it's hilarious nonetheless.