Automatic watering for plants: this self-watering plant device automatically waters up to 3-5 days, perfect for busy days of the week or holidays when plants need water to hydrate plants for days, the water will gradually flow through the release of the clay base. TRANSPARENT DESIGN - These automatic drinking trough is more suitable for medium pots and large plants or flowers in your balcony, office and garden. The opening design makes it very convenient to pour water inside, and is not easy to damage. Convenient to manage and display the remaining water: just fill the water through the hole, then pour the watering into the soil, start working and love your healthy plants. With automatic watering, you can go on holiday without having to worry about the plants. Practical and beautiful: these plastic and clay mushroom trough provide optimal care for your plants and add creativity and beauty to your garden with practical and attractive decoration. Working principle: the bottom of automatic plant watering is a porous swirl of clay filled with water. The water automatically and slowly penetrates the ground without the need to open the holes manually.