Instruct: Classify a given review into positive or negative sentiment.
Query: Warms, Doesn't Heat

When shaving with a straight razor, I mix lather in a ceramic bowl. I wanted a heating pad to keep the lather warm. Coffee heating pads are usually too hot, and they dry the lather. However, I was intrigued by another reviewer who said this product didn't keep coffee warm. Maybe, it would heat lather, but not overheat it?And, this mug warmer works perfectly! It keeps my lather warm, and not hot.But, for heating coffee? Not so good... :(