The elho self-watering insert makes plant care easier and gives your houseplants the attention they deserve without taking up too much time. The insert is a simple watering system that ensures that your plant gets exactly the right amount of water at exactly the right time. The water meter on the unit will tell you when to fill it with water, and your plant will take care of itself for the next few weeks. As I said, simple. The insert fits most Elho indoor plant pots and many other pots, including ceramic pots. The insert offers ultimate plant comfort: all the joys of keeping plants without hassle.