This vase is uniquely shaped with a narrow neck to support a flower bulb—typically a hyacinth—above the water level. Hydroponic Growth: It allows the bulb to stay dry while the roots trail into the water below. Root Visibility: The clear glass provides an educational view of root growth and water levels. Versatile Decor: Beyond bulbs, it can be used for single stem flower arrangements, dried flowers, or as a decorative table centerpiece.