Providing a hygienic environment in the smallest of spaces, the GoBanyo shower bus showcases what vacuum technology can accomplish. The bus, converted from a public bus, offers free showers to the homeless. Despite limited transport capacity for water tanks, complete bathrooms with showers and toilets were installed and operated using Roediger®'s vacuum sanitary technology. This technology significantly reduces water consumption compared to conventional systems, maximizing the available capacity and ensuring 100% leakage protection for safe use.