This coffee warmer used made of bzone plate is yellow and has origin of Germany. It’s used with an alcohol stove To warm coffee, we put alcohol substance in the stove and burn it. Then put the warmer of ready-brewed coffee on the burning stove. This warmer can not filter coffee grounds, so it is only used to heat ready-brewed coffee. It can hold 400ml of ready-brewed coffee. The coffee is heated warm for about 5 minutes, then we enjoy it with sugar pellets.