Just like the water globe except that it looks like a stone. Watering lasts for around three-four times. The underside with the stone has a cork plug which functions to be a drip dispenser. As you can see Boo Boo (the device we have been calibrating) has become all green https://livemistresscam93592.tribunablog.com/the-basic-principles-of-plant-feeder-water-44023961