I know we seem John obsessed, but when this came across my desk, I had to write yet another toilet blog. The “fish-n-flush” system is a great way to teach your children the love of pets while at the same time making it in the bowl. The fish-n-flush system is a clear two-piece toilet tank that replaces a standard tank and cleverly contains a fully functioning aquarium inside. All that learning for only $299. The bonus is when the fish dies it is already at its final resting spot. Then, you can now use the tank as a lovely terrarium for a pet reptile or to house plants.