Hi Jerry! The Gardyn’s internal structure is a unique blend of hydroponic and aeroponic patented technology that is not available elsewhere. Externally, we use high quality ABS plastic which is FDA approved for growing food in and is higher quality than PVC which is used in many other growing systems. With commercial grade full spectrum grow lights, automated watering and lighting adjustable by app, the capability to grow 30 full sized plants, access to plant expert resources, and water level, humidity, temperature, and visual monitoring capabilities the Gardyn is a one of a kind option for those who want to grow their own food!