What's the difference between the katadyn...
What's the difference between the katadyn MyBottle Purifier Bottle and the Katadyn MyBottle Microfilter Bottle?
That is other than the cost.
Also which are the replacement cartridges for each?
The difference is the purification catridge. The MyBottle Purifier has a stage 3 Virustat/carbon cartridge, while the Microfilter comes with the carbon/glass fiber cartridge. The more expensive one just has an upgraded filter cartridge for remove viruses, while the Microfilter does not. However, they both use the MyBottle ViruPur Replacement Cartridge. Which means you can turn the microfilter into the Purifier by simply replacing the cartridge. I apologize if this is confusing!