Photographer's update: This is an early gallery. My later milk studies are better executed. Go to following links for my later stuff:
https://pbase.com/cerumen/milkyway
https://pbase.com/cerumen/heavycream

My attempt at the classic milk drop study. Took nearly 500 images to get these, and many more like these.
Details: All shot with Vivitar 100mm f3.5 macro at f22. Used a single non-dedicated flash off camera on 1/16 power. One hand triggered the remote, the other gently squeezed a milk-filled medicine dropper that was positioned about 3 inches above the saucer.