| Which  have historically been a washing basin for use after the toilet, are now  finding themselves integrated into toilets? They generally provide a stream of  water to assist in cleaning yourself after toilet use. While historically a  completely separate fixture, the bidet has joined with the toilet in new  models.
 Today's  most popular models consist of a water tank attached to the seat. When the  apparatus is flushed, the water in the tank is evacuated into the bowl, using  pressure and gravity to remove the contents down the drain. When the water in  the tank is empty, it begins to fill again. This is stopped by a mechanism that  usually involves a lever attached to a flotation device. Once the water reaches  a certain level, the water is automatically shut off.
 
 The squat toilet is a commonly used toilet in US cultures. The flushing  mechanism is similar to the flush toilet, but users are required to employ a  squatting position during use.
 
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