Each mug is unique and no two are exactly alike. There may be variations in color pattern of the actual mug in comparisson to the picture, Each mug undergoes a firing proces that can vary from one firing to the next. With this particular style of Mitten Mug the glaze firing is held at a specific temperature to allow the crystals or "snowflakes" to grow. Microwave and dishwasher safe. Aprox 10oz