These planters are a container gardener's dream! They have multiple colors and sizes to choose from. Great for indoors or outdoors. Composed of artstone - a resin and natural stone that is UV stabilized so it keeps its color in the sun and it is frost resistant so it won't break or crack easily in the cold winder months. These planters are BPA free and non toxic so you can grow your vegetables or herbs without worry. Plus these planters feature a rubber removable stopper for drainage so you can keep them indoors or outdoors. They have a small footed bottom for airflow and they are lightweight and durable. The water minder reservoir drainage system insert keeps the plants hydrated.