The most efficient irrigation system known to man. Our thick ollas are cold tolerant, are sourced from Baja Peninsula clay, are made by third-generation potters and are the biggest around, 2.9 gal/11 liters. Our medium “Happy Face” Olla has self-appeal and pulls its weight in performance inside containers. Our prices are very competitive, since our potters are in North America, and our ollas are shelf-ready. Free PDF signs to download! Call today for ordering information. Mary Kathryn Dunston, 804-695-7978.