Perfect for cultivating juvenile or rare aquatic plant species. The UNS Glass Cup is perfect for cultivating aquatic plant species in an enclosed area of the aquarium. Made from high quality glass, this plant cultivation cup is extremely durable and comes with suction cups to safely adhere it in the desired position. UNS Glass Cup is recommended for cultivating juvenile aquatic plants, fragile aquarium plants or rare plants that may require additional monitoring before transplanting. It may also be used to assist small aquatic plant species with root system development. The bottom has a small hole for ventilation and airflow.