In Cannery Row, one of the main characters, Doc, recalls a conversation:
Blaisedell, the poet, had said to him, “You love beer so much, I’ll bet someday you’ll go in and order a beer milk shake.” It was a simple piece of foolery but it had bothered Doc ever since. He wondered what a beer milk shake would taste like. The idea gagged him but he couldn’t let it alone. It cropped up every time he had a glass of beer. Would it curdle the milk? Would you add sugar? It was like a shrimp ice cream.