Slick Rock Concrete CR3012-GRAY 30" Camber Round Gray Water Bowl the perfect addition to your pool or garden, Slick Rock’s Camber water bowl is handcrafted with our proprietary superior strength concrete [SRSCC] proven to surpass the competition and resist the test of nature. Because we carefully cast each of our concrete water bowls, and we stain our concrete instead of painting the final product as competitors do, you will not find two water features alike. Our Camber water feature does not require a copper liner to control the water flow and it comes in a variety of colors from you to choose from. Don't forget to ask about our newest water bowl installation kits.