Reservoir at the bottom of the plastic flower pot is designed to store water, and the cotton string absorbs water into the soil for the plant. To help you take care of your plants more quickly and conveniently, the herb pot has self-watering developed a unique detachable spout. You can water directly from the side entrance, so you don't have to worry about hurting your plants by overwatering Material: Watering pot is made of high quality plastic, which is strong and durable and not easy to deform or break . The indoor flower pot separates the storage tank and the potting soil, and the soil and plants are always above the storage tank, so the water in the flower pot storage container does not flood the fragile roots of the plants. The plant soil and the reservoir are connected by a wick, and the plant can continuously absorb the water in the reservoir through the wick. Package Content: Set of 4 plastic self-watering flower pots. Note: Plants and decorations are for demonstration only, NOT included.