Any time anybody tells you that coffee makes you sleep you don't need a play on words to know it's the bunk.
7 seconds sound clip from the Christmas in July (1944) classic radio play.
You can hear this line at 00:07:23 in the radio play.
Quote context
[...]
- So I say if you don't sleep at night it isn't the coffee it's the bunk. Do you get it?
- You guess so, what's it mean?
- Yes. But do you get the play on words?
- Oh Jimmy, you don't need a play on words.
- Don't you understand? Don't you understand it's funny?
- Ooh!
- Oh Jimmy, you know I want you to win. I'm just as anxious as you are.
- And gee, when you lose this one, just think how much better your chances are on the next one.
[...]