This is my favorite, hydrophobic materials.
First up in this video we will cover ultra hydrophobic material's, also know as the lotus effect. The lotus effect refers to self-cleaning properties that are a result of ultrahydrophobicity as exhibited by the leaves of Nelumbo or "lotus flower". Dirt particles are picked up by water droplets due to the micro- and nanoscopic architecture on the surface, which minimizes the droplet's adhesion to that surface. My favorite part is were they throw a tub of mud on two guys wearing suits and nothing sticks on the one! also the ability to completely waterproof electronics with this stuff is amazing. You can read more about this amazing plant on wiki: Source
Also covered in this video is Hydrogel, Gallium Metal , Aerogel and last but not least Magnetic Thinking Putty very cool stuff. Maybe drop a comment and let me know which one is your favorite?
I hope you enjoyed this video thanks for stopping by, Cheerz 
