The Mr. Coffee COSORI Premium 24 Watt Stainless Steel Coffee Mug Warmer. It looked great in the photo. Just turn it on and set the temperature. (This is designed for use with flat-bottom mugs for the most effective warming.) Keep warm or warm up your drink to as high as 131F/55C. Notice the highest warming temperature is 131F, but the description also says: Temperature Range 77°-230°F (25°-110°C). Also this device is equipped with a power adapter plug to make the power supply voltage only 12v rather than 120V. Giz Wiz: It's also 24 watts vs. 17 watts for my old “Mr. Coffee” warmer, which is about 30% more. As of 9/8/18 it's $29.99, and there's a “5% off” box to check if you purchase one. It's not much, but it should knock $1.50 off the price. It got 4 out of 5 stars from 450 customers. Prices and ratings can change at any minute on Amazon.