Adjustable valve: U-shaped switch interface, the switch does not follow the rotation of the switch when adjusting the switch, one-handed operation, no rotation (different through the interface), the switch can be finely adjusted (different internal structure), offer different water quantities for different plants and flowers. Easy to use: quick installation, no twisting required, easy to set up, watering device for plants, water supply directly at the plant roots, suitable for most plants. Easy flow control means your plants get the right amount of water. Perfect design: bottle stopper design, suitable for all drinks such as Pepsi, Cola, Dasani water, Dr.pepper, Deet Cola, Coca Cola, which are easy to find. This bottle opening is easy to install, no need to rotate, just insert and release, never leak out, windproof and collision-proof and suitable for large drink bottles. Let your plants easy for you: enjoy the time with your family. With these self-watering spikes, your plants will be well maintained. In addition, you can save time and energy without having to water every day, and no need to carry heavy watering cans anymore. Suitable for your vegetables, indoor and outdoor gardens, hanging plants, small trees, shrubs, daily water plants, potted plants, indoor plants, herbs, garden plants, hanging baskets, sinks.