Bizen Ware Ceramic Vase Bizen ware is fired without glaze, resulting in fine pores and slight breathability, which is said to prevent water from decaying easily. This breathability allows the water to "breathe" by taking in outside air, making flowers last longer. I've used this for about 5 years and stored it for about a year. Please check the size in the images. Thank you very much! ☆