For those of you who use this, or types of this, filter, I have a couple of questions. I have always used pump type filters for hiking. Hiking & living in New England, I have to deal with Crypto, so water is ALWAYS filtered when taken from water sources. I trust members here with real world experience far more than labels on boxes. That being said, provided I filter out all the muck & stuff with a bandana, all I would need to do is simply plop this into a bottle, and it will sterilize it? Does it work well for all types of waterborne diseases (lets say whats common in the US in the woods-nothing exotic like in 3rd world countries)? I keep leaning towards one of these filters, but am still clinging to my trusty pump one-partially out of comfort, and partially out of ignorance to the steripen brands.