A toilet comprising a rinsing seat, a rimless bowl, and a helical loop trapway is disclosed. An annular cavity for the purpose of storing and dispensing rinse water from the rinsing seat is disclosed. Outlet nozzles arranged about the circumference of the rinsing seat and designed to dispense rinse water at the rimless bowl are disclosed. Rinsing seat supports, hinge assemblies, and seat sensors which offer additional functionality to the rinsing seat are also disclosed. The toilet includes a steep interior surface with a titanium dioxide coating and actuatable ultraviolet light sources. The titanium dioxide has antimicrobial properties in the presence of ultraviolet light to sanitize the toilet. The ultraviolet light source is actuatable to control when the antimicrobial properties of the titanium dioxide coating are activated. The exterior of the toilet is coated with doped titanium dioxide which is antimicrobial in the presence of visible light.