Lechuza Cubi Premium 9 Planter with Water Level Indicator, Mini, Charcoal Metallic The MINI-CUBI planter is perfect for small spaces Made in Germany of durable frost and UV resistant PP plastic for indoor or outdoor use Simple yet elegant design complements any decor Self-Watering System features inorganic granulate compounds that provide the right amount of water to plant roots A water-level indicator lets you know when it is time to refill the reservoir