Water Purifying Flower / Water purification devices

Water is necessary to human, so how to get clean water is an important task. Water Purifying Flower is a device which can sterilize the water by photocatalyst. The flower is crystal clear when first put into the water, and will become other color after finish the water purifying process. The change of color means two things, one is that the flower bloom, the second is that the water is purified and could be drunk now.