From the text:
Soda is handsomer than anyone else I know. Not like Darry--- Soda's movie-star kind of handsome, the kind that people stop on the street to watch go by. He's not as tall as Darry, and he's a little slimmer, but he has a finely drawn, sensitive face that somehow manages to be reckless and thoughtful at the same time. He's got dark-gold hair that he combs back--- long and silky and straight--- and in the summer the sun bleaches it to a shining wheat gold. His eyes are dark brown--- lively, dancing, recklessly laughing eyes that can be gentle and sympathetic one moment and blazing with anger the next. He has Dad's eyes, but Soda is one of a kind. He can get drunk in a drag race or dancing without ever getting near alcohol. In our neighborhood it's rare to find a kid who doesn't drink once in a while. But Soda never touches a drop--- he doesn't need to. He gets drunk on just plain living. And he understands everybody.