Yes, the MSR Filter shows as working pretty well without the "Purfication" drops. Funny that Katadayn hasn't caught on and added it. Their comparable filter would all have three check marks as well if some bleach was included in the kit.

So, I think I will get some Chlorox in a small dropper bottle and carry with my Katadyn Hiker. Filters the water and couple of drops (I believe it's 4 per quart) will purify it and I am good to go.

Thanks again for posting this up Blast.

If you want to go with a dropper bottle, use an old, glass perfume bottle. Most medical droppers use a plastic bottle that the bleach will slowly attack- the dropper will still work, but the bottle itself will be weaker.

Did they not cover ultra-violet treatments such as SteriPen? I couldn't see it listed.

Katadyn MP1 tabs still kick butt! On my last backpacking trip I did away with boiling and carrying a filter, just a few of these tabs.

I like the idea of glass to hold the bleach, but if it slowly attacks plastic...what kind of plastic is the bleach sold in? I mean I bought it in a plastic bottle, so I would assume that some plastics are impervious.

From the Wilderness Medical Society...

http://www.wms.org/CIDwaterdisinfection.pdf

http://www.wms.org/Chemical_disinfection_Products.pdf

Old Bleach bottles leak. I had one wrapped in a poncho liner in my vehicle kit. The bleach leaked and dissolved part of my poncho liner. $%^&^#%$^%&