Let's see how this is accepted. Oil and water aren't really opposites, but they are kind of filling that roll.
I like how this turned out. A square vase is filled with oil. A syringe is used to squirt green colored water into to oil, while I have a soft on setup to light the scene.
Statistics
Place: 16 out of 52 Avg (all users): 5.8734 Avg (commenters): 7.0000 Avg (participants): 5.8261 Avg (non-participants): 5.8929 Views since voting: 474 Views during voting: 144 Votes: 79 Comments: 3 Favorites: 0