Aw, I was hoping for a sonic shower.

Joking aside, this is good work. I'm sure it will be very helpful in areas where water is scarce or contaminated. Donating the product to charity for every commercial purchase is a brilliant move that will help spread usage as well.
As far as replacing water baths in areas where that is available, I'd be curious as to if any studies for long term effects of using the product have been conducted. I think I'd want to read a little more about it overall before I considered using it myself.