Information via Arbitrary Objects

Anything that conducts electricity can be used to send information. Different objects have their own resistance, frequency response and noise sources. When I was experimenting with sending nonsynched video (where it is sent without a synch, and then "tuned" upon reception) through spring reverb, I also sent the video through a cup of water. This should work from one side of a pool to another, so long as you account for the water's resistance. What would be more interesting is to transmit between two separate faucets in the same house (ultimately connected at some point), or through a tree trunk.