I would like to warm my coffee cups before breakfast. I saw a cordless warming tray. Anyone every heard of this. You heat it up for 8 minutes and it stays warm for 60 minutes. I could heat it up and put it in the dining room and have warm coffee mugs ready for coffee. I think our Deneen Pottery Mugs suck the heat out of coffee very quick and would be great if we heated them. I sometimes fill them with hot water before guests come down but that is a bit of a hassle.