The truth is that people drink way too much bottle water. Zuvo, its manufacturer claims, is one way to help reverse that trend. It uses a five-step technology—ozonation, ultraviolet light, photo-oxidation, filtration, and post-filtration UV—that reduces unwanted contaminants but does not strip the trace minerals that give water its desirable taste. You can buy it as a countertop unit or as an under-counter installation. www.zuvowater.com.