The GreenStalk Garden Lid is ideal for keeping leaves and dirt out of the top water reservoir and maintaining a clean watering system. The sliding leaf design allows for easy watering as needed but stays closed to block critters and debris. It works well with any size GreenStalk Vertical Planter. It is not compatible with the GreenStalk Spring Watering System. Whats Included: GreenStalk Garden Lid (Lemon) that attaches to the reservoir