Coloring The Background With Flash

I've long wanted to experiment with changing the color of a background using flash shot through a translucent colored object. I finally found an opportunity to try it out, because Jakey had just eaten, so I knew he and his mom would be glued to the couch for awhile. I shot the background flash through my sister's clear blue water bottle so the formerly white wall in the background became bluish. I don't know if the blue helps or hurts the photo above, but I look forward to trying this again with different colors and in different settings.