When was the squat type toilet invented?

The squat toilet, which has ancient origins, is believed to have been used for thousands of years, with evidence suggesting its existence in various cultures as far back as 2500 BCE in the Indus Valley Civilization. The modern design and widespread use of squat toilets, however, became more standardized in the 20th century, particularly in Asia and parts of the Middle East. Their popularity is often attributed to hygiene and ease of use in certain cultural contexts.