Salad Sunrise by Droog Design
Sitting in physics class in high school, I never knew I'd be using the same laws for my salad dressing years later. Oil is less dense than vinegar and as such floats on top. So if you need some oil, you use the spout on the left of the picture, and if you need some vinegar you use the one on the right. Genius and geeky. Just my style.