Parabola Planter || Etched BlueParabola Planter in Etched Blue by Campania International Add the Parabola Planter in Etched Blue and add this whimsical hue to your landscape. Glazed planters are an excellent way to add interest to any garden space. The Parabola Planter in Etched Blue is sold as a set of 8. Sets cannot be separated. Material: Campania International's glazed terra cotta planters are handcrafted from natural clay and fired at temperatures between 990 and 1000 degrees