Beer steins, specifically a "Playboy Club Black Matte Tankard Beer Stein Mug Set of 2". A beer stein, or Bierkrug in German, is a traditional beer-drinking vessel, often made of ceramic or glass with a handle. Steins have been used for centuries, with early examples dating back to the 16th century. The term "stein" comes from the German word Steinzeug, meaning stoneware. The pictured steins are black, matte, and appear to be part of a set, possibly associated with the Playboy Club brand. They are tankard-style steins, characterized by their large size and cylindrical shape.