A superhydrophobic surface repels water, and water droplets hitting this kind of surface rebound completely. It is almost impossible to wet these surfaces, therefore, possible for holding and performing experiments with water or other fluids on them. Researchers from the department of Chemistry & Biochemistry at Arizona State University in the US used super repelling knives and surface for slicing a water droplet.
This GIF shows a water droplet being cut by a knife on the mentioned surface. It was pinned by wire loops on both sides