I'm looking for a dual flush toilet that has an obvious indicator. I've seen some that have a rectangle or circular shaped button on top, so you know it's dual flush and can choose appropriately. But who makes good ones? I have a pressure assist dual flush Mansfield in the master bath that we are VERY happy with (push down for a light flush, lift for a heavy flush). But we're looking for something for the main bathroom that won't require us to post a sign on the wall for guests thanks.