The glass material is easy to clean, just needing immersing it in water, and it is non-toxic and harmless. Easy to use, as the water begins to run out, just refill the bottles so that it can still water your potted. It is a for you to grow your plant indoor and outdoor, growing healthier plants by preventing over and under watering. The various shapes for you to choose from, which is a good ornament. The automatic watering device is suitable for the lazy, which is convenient for life and you do not worry that you will not forget water your flower.