Rattettouille (sp) references in other pixar films?

I have noticed that in many

Pixar films, they have little hints about the next Pixar film- like a shot of Doc Hudson (w.o the eyes of course)

in the Incredibles, or the plushie of Nemo in Monsters Inc.

Where there any hints of Rat. in any of the

other Pixar movies? The last one before it was Cars, right? I don’t remember any hints in Cars. Did I miss any?

Anyone spot one in Cars or another Pixar film?

We already talk about this topic here: Pixar In-Jokes