Self-watering principle: The cotton rope absorbs water from the flower pot and keeps the soil moist. You don't need to water your plants every day; this will save you the trouble of watering them every day. Very practical and suitable for beginners. Visible water level: Our self-watering pots for indoor plants are made of high-quality transparent PET material, allowing you to easily observe the water level in the self-watering pots and remember to refill the water in the pots. Long-lasting water storage: The double-layer design can store excess water at the bottom of the pot. The water separates from the liner and is absorbed only by the cotton. The outer basin can hold water and can last for 7 to 15 days. You no longer have to worry about your plants wilting when you go away for a few days. High Quality: Made of new raw materials, formaldehyde-free, non-toxic, heat-resistant and cold-resistant. They are safe and durable. NOTE: Plants not included.