I agree with kctibs. I have a Katadyn I bought some years ago that is a pump, and it was pricey, and I have never used it. I bought it during the y2k thing, and it is safely stored. The Berkly is one that I will one day buy. I have a ceramic on my frig, and we cook and drink that water, but I wish I had a Berky. It make a huge difference in taste, even in coffee and tea.