Create perfectly cooked boiled eggs every time with the Appetito Colour Changing Egg Timer. The heat sensitive egg timer is placed in the pan with your eggs and will indicate when they have been cooked soft, medium or hard. The sensor will account for the number of eggs, the amount of water and even the altitude at which the eggs are being cooked. Use room temperature water and bring eggs and timer to a medium boil. Remove the eggs from the pan when the timer indicates your preferred yolk firmness. Changes colour as the eggs cook. Cook soft, medium or hard-boiled eggs to perfection. BPA-free. Allow the egg timer to cool slowly on the bench - do not immerse in cold water.