They end up in the toilet anyway!
Developed by California-based Aqua One Technologies, the FnF is a filtered acrylic aquarium wrapped around an integrated flush-tank core. The aquarium exists independently of the toilet’s reservoir, so you won’t annihilate your buddies after every urination. But, to keep things interesting, the flush valve does launch a jet stream into the tank that swirls the fish. [Source]
Thank you c|net