Who did not dream of making such a great photo as the milk or water drop stopped in mid-air?
But this seems quite difficult. It may be, but there are a few techniques that can simplify things a little. Gavin Hoey, in the following video, shows a few of them, explaining lighting issue and telling us that even without motion-detection equipment it is possible to catch the droplet: Just shoot a zillion photos with your flash and hope for a little luck to bring a good image out of sheer luck. This is not as silly as it looks and digital photography made this actually practical (you will not mind erasing dozens of failed attempts on the path to a great image).
If you want to try your hand at it, remember that the flash is used to light not the droplet itself (it’s transparent), but the background which may be white or colored.
But if you still want to use a little more expensive equipment, you can check a specialist: Hiviz.