Used only once after purchase for roasting marshmallows. It's a convenient item to have. ● This is an auxiliary tool to prevent the flame from weakening on the trivet of a gas stove with a temperature sensor (※). ● Recommended for those who find cooking difficult because the flame weakens in response to the sensor. ● You can freely adjust the gas flame, allowing you to cook while checking the degree of roasting. ● Made of heat-resistant ceramic (heat-resistant ceramics) with a temperature difference resistance of 700°C, so there is no need to worry about cracking due to temperature differences if used correctly. ● If the main body gets dirty, you can scrub it with a metal scouring pad or brush. ● The back fits into the trivet and is designed to be non-slip. It does not support square trivets. ※ Gas stove with temperature sensor (SI sensor) A gas stove equipped with a function that senses the bottom temperature of the cookware and cuts off the gas or automatically adjusts the firepower when the temperature exceeds a certain level. (Only sensor-equipped stoves have been sold since October 2008.)