Where is the link to Katadyn's website around here? A good water filter might save someone's life. But wait... ETS doesn't get any royalties for Katadyn water filters, so let's not show people that particular piece of equipment.
There are a lot of people discussing all types of katadyn products if you do a search. In fact, there have been
entire threads dedicated to different types of water filtration devices by all manufacturers including Katadyn.
This thread was where someone was specifically asking how to benefit a specific non profit corporation the best. All the responses have been on topic with the original question.