“Teach cat to pop in the toilet” sounds like a mission impossible, however, a cat lover figures out a way to do so.
First, he puts a lasagna tray of pine chips on the toilet;
Second, moving the cat litter box by it and add some of the cat “pop” to the pan, the cat will figure it out by himself, and starts to pop on the toilet;
Thirdly, here is the tricky one, you need cut bigger and bigger hole of the pan litter over 2 weeks of time, let the cat gradually get use to it. After another week, the cat will use the toilet only for pop business, the room is odor free. Congrats!