As part of our Artemisia Lab program, we’ve been testing the High Sierra shower head. Invented in 2006 by David Malcom, the patented design is inspired by agricultural irrigation nozzles. The result is a high-efficiency, 1.5 gallon-per-minute shower head that isn’t just an incremental improvement over the crowded field of competitors but is in a league by itself because it relies on a totally different design. This compact, plumbing fixture, which is shaped kind of like a D-cell battery, could go head to head with any shower head, even higher-flow ones, and win.