- 1 piece of self-watering nails for plants, a highly sought-after solution for effortless plant care. This innovative design delivers water directly to the roots of any plant, making it ideal for automatic watering systems for both indoor and outdoor potted plants. - Features an adjustable valve, perfect for maintaining moisture in your plants while you're away on business trips or vacations. With this automatic watering device, you can ensure your plants remain hydrated without worry. - Easy to use with no tools required: Simply attach the fixed side of the watering tip to the neck of a filled bottle. Turn the bottle upside down and insert it into the soil. Enjoy a leak-free experience as the device manages pressure effectively. - Compatible with most plastic bottles, including water bottles, soda bottles, and even wine bottles, making it versatile and convenient for various household items. - Ideal for a wide range of applications, whether you have indoor plants in your office or outdoor plants in your garden. This automatic watering solution guarantees your plants receive the necessary hydration, ensuring they thrive even in your absence.