- Half a pint, sir.
- Quinine.

3 seconds sound clip from the The Bridge on the River Kwai movie soundboard.

You can hear this line at 01:47:23.747 in the Blu-ray version of the movie.

Quote context

[...]

- If we set a faster pace, we could make it before sundown on the 12th.

- It's worth having a go for the train, don't you think?

- Oh, by all means.

- Good hunting. Good show. Jolly good fun. Jolly, jolly good.

- If you hadn't fixed the radio, we wouldn't know about the train.

- Well, there's always the unexpected, isn't there?

- Half a pint, sir.

- Quinine.

- Well, we'll complete this later.

- Clipton, we're facing a crisis.

- Yes, sir?

- I've just spoken with Reeves and Hughes and we're not going to finish the bridge on time.

- We just haven't the manpower, that's all. I've asked the officers to lend a hand, and they've agreed, but even that won't do it.

[...]