Nature's Distributing Stacking Planters - 5 Tier - with Patented Flow Grid SystemOUR PLANTERS STAND ALONE: The ONLY patented self watering system available (Yes, you must add the water). We are the pioneers of the Stacking Planter industry! MULTI TIER SET: Set consists of five tiers of planters, five patented self watering grids, tray (for stacking), chain with swivel (for hanging), and instructions. SELF WATERING BENEFITS: Don't worry about overwatering! These pots can self regulate so plants stay healthy and hydrated, Self