BGR reports that scientists in Wuhan, China have invented a toilet bowl that can't be stained. The 3D printed surface is made of a material that repels feces easily. Even after the researchers vigorously applied sandpaper to the surface, it still kept poop-free, or at least free of the simulated fecal matter. Their science-y article in the journal Advanced Engineering Materials describes how the "abrasion-resistant super-slipper flush toilet" works.
It sounds very promising, but field testing is necessary. Give me $20 and access to a Taco Bell, and I'll let you know if this toilet bowl is really up to spec.
-via Dave Barry