The best hot tea companion in winter! - 500ml compact size - 4 levels of temperature ( 45 / 60 / 85 / 100°C) and 3 levels of heating time ( 10 / 30 / 60 mins) for different ingredients. - Easy-to-clean detachable glass kettle with wide lid opening. - Made of borosilicate glass. The high temperature tolerance allows ice and hot drinks. - After heating to the desired temperature, it automatically switches to 55°C keep-warm for 8 hours.