The car the Andersons are in when leaving home, is not the same car shown on the road. The car seen on the road is all one color with a split windshield and an older, different body style from the one they left in, which has a single-pane windshield and a two-tone paint job.
When handing out the sodas after removing their tops, he hands Cathy a dark colored soda and she takes a lighter color (orange?) soda from his hand.