Tushy Classic Bidet Toilet-Seat Attachment (White/Silver Knob) This older model of Tushy Classic Bidet Toilet-Seat Attachment (White/Silver Knob) ($79) also has a slightly thicker base and requires manual nozzle washing by turning the knob all the way to the left. Image Source: amazon.com Tushy Classic Bidet Toilet-Seat Attachment (White/Silver Knob) $79 from amazon.com Buy Now