A flush toilet is a plumbing fixture used for the disposal of human waste. It operates by using water to carry waste away from the toilet bowl into a sewage system or septic tank. When the user presses a handle or button, water from the tank flows into the bowl, flushing the waste down the drain. Flush toilets are commonly found in homes, public restrooms, and commercial buildings. They are designed for hygiene and convenience, helping to maintain cleanliness. The invention of the flush toilet has significantly improved sanitation and public health since its development in the late 16th century by Sir John Harington.