Double-walled, stackable mug. The inner and outer walls are made from recycled stainless steel. This keeps hot drinks at temperature for longer. Finished with an attractive powder coating. Total recycled material: 87%. Capacity 300 ml. Stainless steel can be recycled many times whilst retaining the quality of the material. By using recycled stainless steel, fewer new raw materials are needed. This means less energy consumption and less use of water.