Not only are they remarkably tasty, but due to the unique positioning of these little holes, they are capable, when blown through, of rendering a tuneful whistle.
13 seconds sound clip from the Chitty Chitty Bang Bang (1968) movie soundboard.
You can hear this line at 00:28:50 in the Blu-ray version of the movie.
Quote context
[...]
- If I may be allowed to explain, sir.
- You have exactly 20 seconds.
- Yes. Well, the fundamental novelty of these particular sweets is their musical quality.
- Place your fingers over the holes and blow thus.
(STEAM WHISTLE BLOWING LOUDLY)
- Too late. Had your chance. Muffed it. Good morning.
[...]