Also called a walk-in shower, a zero threshold shower can make your master bathroom even more special. In this design, not only is there no threshold, but there isn't even a door to fumble with. Wondering where the valves are in the picture? They are on the inside of the knee wall next to the shower entrance, allowing you to reach in and turn the water on without getting wet. Of course, the most important fact about this shower is the same a all good showers: it doesn't leak. Aesthetic, funcionality, and peace of mind make it a great place to shower in the morning.