Memories of the good old days are awakened with these nostalgic mugs made of genuine steel enamel. Freshly brewed coffee warms your hands, pure campfire romance! They're also ideal for trekking or camping, as these mugs are much lighter than ceramic mugs. Washing them out is also a breeze thanks to the hygienic enamel surface. The manufacturing process for enamel mugs inevitably involves certain irregularities. These manifest themselves in the form of slight swelling and dents (without loss of enamel) and small black dots on the surface of the mug and on the handle. These enhance the retro look of the mugs and do not constitute grounds for complaint.