Hydrophobic water?

Sure, because I have a whole bunch of aerogel just lying around doing nothing. I'm just going to smear it around on paper so I can see what colored water will do.

Honestly, though, I'm curious whether HDPE powder will have similar effects. The water drops rolling next to each other in the videos down below seem to look about the same. Check out the various videos from InnovativeMaterials.

The sight of water drops nearly invisibly coated so that they won't do what water droplets do - glom together and form a single, larger, uber-drop Katamari-style - is a little creepy, though.