Our Cape Cod 20 x 20 x 20 Square White Self-Watering Polyethylene Planter perfectly captures the New England way of living - transforming your outdoor space into your own personal retreat. These planters are made from 100% high-grade Polyethylene and have an ultra-tough construction. Double-wall design provides the roots and potting mix with adequate insulation from surrounding weather conditions. This Cape Cod Planter also comes with a built-in water reservoir that provides your plants with a consistent source of moisture.