Come and see our amazing products. This product is made of iron and aluminum, durable and fastheating in 20-30 seconds. Very easy to operate. It is designed for flat bottom mugs, make sure you have your mug bottom in full contact. Please don't expect it as a heater or keep your coffee super hot.3" diameter warming surface. The warmer is spill-proof in case you spilled liquid and avoid the damage and avoid the damage while most coffee warmers made with plastic can not tolerate spills well. Note: Do not pour water onto it.Your logo imprint is available. Pls confirm further with us if any query about packing info, inventory status and time schedule.