Organic garbage, like banana peels and coffee grounds, stink. Sitting in your garbage can all day at room temperature guarantees that your place will smell like a dump. Not if it's frozen, however.
The Minus Frozen Garbage Container is a concept device designed to keep the sink down by holding your garbage at below-freezing temperatures. Sure, you could just empty the trash more frequently, but wouldn't you rather spend a lot more money and use up a lot more energy? Of course you would. [Yanko Design via Ubergizmo]