Our popular Umbra Otto Foaming Automatic Soap and Sanitizer Dispenser is now available for foaming soap. Otto's touch-free technology minimizes the spread of germs while being eco-friendly, efficient, and easy to use. The clear base makes it easy to monitor soap levels, and it has a large opening that makes refilling easy and mess-free. Otto's 9.5oz (280 ml) capacity can be filled with liquid hand soap by combining soap and water (1-part liquid soap with 5-parts water) to create foaming soap.