Small plastic hearts put in a glass of water. I "painted" the surface of one heart with vegetable oil so that it'd float on the water. The other sank to the bottom. A flash from beneath causes the light and the red to bounce everywhere and reflect off the glass, the bubbles and dust and whatever else was floating in the water.
In the end it creates a kind of painted/metallic look.
I took this for this week's Twitter Photo Challenge ("Band Name"), a most literal and obvious interpretation of the band name "Heart" (I don't even know whether they're in business anymore).