That is interesting. I'd not seen that product to go along with the Sweetwater filter.

I have a filter, but I've switched to carrying the MSR Miox instead. The mixed chlorine dioxide solution the Miox creates provides better killing power than chlorine bleach AND I don't have to carry a bottle of nasty stuff (bleach) in my bag.

The Miox didn't get a very good rating for Cryptosporidium. They say the MSR Miox recommended procedure didn't really give the required reduction in Crypto after 4 hours (while the Micropur tablets did). I really wish MSR or anyone would publish independent lab data to support or dispute this. For right now, based on what I've read about the Miox and the chances of encountering crypto in water in the U.S., I don't think I'll have any problems with the Miox.