The Neher Pottery Blue Drip Glaze Hand warmer Mug is a unique and handmade two-piece set that features a swirl pattern and glossy finish. Made of clay with a blue color and signed by the brand, this 12 oz mug is suitable for hot beverages and has an arts & crafts style. Produced in California using pottery techniques, this original piece is perfect for all occasions and is a lovely addition to any collection.