The Outdoor Plus OPT-AVLPO36-BLK 36" Black Avalon GFRC Concrete Planter Bowl. The Avalon Planter Bowl is a modern take on the traditional tapered square bowl. It has a gorgeous curved structure that is sure to provide a visual pleasure to you and your guests. Our Fire & Water Features are individually handmade and proudly manufactured in the U.S.A. The fire & water features TOP manufactures are durable and long-lasting in a variety of environments. Because of its handmade nature slight variations in color and texture may occur.