This set of 4 thermal mugs called Liss is designed with a double wall to keep your coffee or tea warm for longer. Made of stoneware, the mugs from House Doctor are finished with a grey glaze with minor, deliberate imperfections to create a rustic, everyday look. Instead of a handle, the tapered design makes the mugs easy to pick up and comfortable to hold. Use the mugs for your afternoon coffee with friends or tea in the evenings. Whenever, really. They are an ideal choice for occasions that require some everyday elegance.