These stainless steel idli (steamed rice cake) makers are perfect to use inside a pressure cooker or large pan. Simply pour a couple of centimetres of boiling water at the bottom of the pan, scoop the idli mixture into the circular grooves on each tray, stack another tray once filled and steam gently until the idlis are ready. Diameter 7inches (18cms). Each tray is suspended on a central column, simply unscrew the top to remove the tray.