Interesting - I'm also looking at this. I have a Voss water bottle that I was going to use. I bought some acrylic tubing but I hear you are not supposed to use acrylic with the nopox stuff. So looking at tubing for the dosing line and what to use inside the bottle to reach the bottom. With regards to the valve on the outside what is that? Couldn't you drill in a tiny 1/16 or so hole or does it evaporate fast.