The Weekender 16&rdquo; Self Watering Hanging Planter FORREST GREEN 2 Pack Made of shatter-resistant polypropylene. Large 16" Diameter x 10" Height. Water normally and it retains over a gallon for reserve. Removable liner insert made of .125 inch thick polypropylene holds 745.42 cubic inches of soil, 6.3 inches deep. Eco Friendly, this pot helps to reduce hanging basket waste 90% based on 10 year container life.