With the introduction of the government's WaterSense
label (similar to Energy Star), manufacturers are getting smart about reducing toilet and faucet water use.Low-Flow ToiletCaroma,
an Australian company, was one of the first to offer dual flush technology, which allows for two different flushing options: .8 and 1.6 gallons per flush. And now almost all of the large toilet manufacturers offer dual-flush toilets. Caroma has 31 different models (shown is the Adelaide Cube).