You can choose whether to keep the liquid temperature or raise it to 31F/55C by touching the "Power Button". After turning off the coffee machine, the red light flashes for a moment to remind the hot plate that the hot plate is still hot. Note: You can also touch the Power button to turn it off. Use the right cup: Use a thin-walled, flat, or slightly concave cup for best results. This coffee mug warmer is suitable for cutlery, stainless steel mugs, mugs, milk cartons, glasses and more. Safe and durable: The metal explosion-proof plate is used to make the heating and heat preservation process safer, and the heat dissipation holes at the bottom extend the service life of the product. GREAT GIFT CHOICE: Delicate and compact design keeps drinks warm all day. It is a must-have for lovers, fathers, mothers, wives, husbands and all relatives on special days like Valentine's Day, Thanksgiving and Christmas. A good gift represents a noteworthy occasion. Note: This product does not include cups