So I was chilling at the Good Karma Café (I wonder how many cafes in the U.S. are named this? I bet a lot) in Center City, Philadelphia just soaking in well, the good karma...when I noticed that they had had a pretty cool system for keeping their bathroom smelling good. They had several reed diffusers located inconspicuously throughout the small single seat bathroom. One was on the window sill (pictured), two were perched high up on a cabinet and one was on the tank. The reed diffusers were transparent but simple in their design and innocuous in their placement.