Ok, cool idea... here are my concerns with it.

1. Despite popular opinion, water bongs DO NOT work for filtering hits. The long and short of the argument is, that the water pulls more thc out of the smoke than other nasty stuff, so while per unit of smoke there is less nasty stuff, there is also less thc which means you need to smoke more, which means you are actually putting MORE nasties into your lungs than conventional methods.

2. The other main reason (aside from the fact that they are cool as hell) that people use bongs is to cool the hit, so it goes down easier. However, I've never had an issues with water bongs hits being too hot. If they are, just wait a second or two before actually taking it in.

So basically in conclusion, cool idea, glad it worked, but I'm not seeing the point? If you got stoned thats the important part, but if you were trying to improve on the water bong, I think you may have missed.