Droplets of three different liquids – water (dyed blue), oil (hexadecane, dyed red) and alcohol (1-butanol, dyed yellow) on a dip-coated duck feather. The dip-coating process enables us to provide a conformal coating of extremely low surface energy fluoroPOSS molecules on the surface of a duck feather. The synergistic effects of the duck feather’s re-entrant surface texture and the low surface energy of fluoroPOSS molecules allow the feather to easily repel various kinds of liquids (with a wide range of interfacial tensions) from its surface. We term such a surface “omniphobic”. The reflective surface visible underneath all the liquid droplets is a signature of trapped air or the formation of a liquid-solid-air ‘composite’ interface. All droplets shown in the image are between 2 – 3 mm in diameter. Image courtesy of Anish Tuteja / Wonjae Choi.