In article . com,
Richard Riley wrote:

For water purification, the most interesting thing I've come across is
this.

http://www.miox.com/News/CDI_MIOX_License.html

I have one. I bought it on sale for $100 at campmor.com last summer.
First I filter with an MSR MiniWorks filter, then I purify with the
MIOX.
I use to just filter, but the more I read, the more I realized how
lucky I have been in the past. So I added the purifier.