Excellent Plant Helper -- This self-watering drip irrigation system automatically waters plants. It's designed to prevent overwatering and ensure that people don't water while on vacation. One liter of water lasts approximately 7 to 10 days, depending on the plant type, soil composition, and humidity. Premium Material -- The plant watering spikes are made of clay. The porous material works through osmosis, automatically releasing water and allowing it to seep through slowly. By maintaining consistent soil moisture, you can help your plants thrive and grow stronger. The finer the spike, the faster the drainage. Usage Tips -- The upright design of the self-watering globes allows for a larger water capacity, and the round hole at the top makes refilling easy. First, soak the watering stakes, dig a hole in the ground, then gently insert the watering spike into the ground. Simply pour water into the top of the watering bulbs with the opening facing upwards. Perfect choice for the garden