The Chieftan Garden Tray has a multitude of uses. With an exceptional depth of 5 inches it works great for potting plants and also for use under grow bag and potted plants etc. Perfect for the kids too for messy play in the garden and for use with sand and water tables. Tray also works great for mixing cementconcrete mortar sand or other building materials. Made of recycled polypropylene and built to last!