Automatic irrigation: water is automatically delivered directly to the roots of the plants. The automatic drip irrigation system eliminates worries about forgetting to irrigate or being left unattended. You don't have to water it every day. Automatic sprinklers: Automatic sprinklers are equipped with a universal tilting cover to solve the problem of water leakage. Fits most beverage bottles. The holder is designed to be windproof and rainproof, even a large bottle will not fall. Adjustable water flow: the valve can adjust the drainage speed from 0-60s / 1 drop . Slow drops last from 1 to 15 days. Depending on your vacation, you can manually adjust the flow to maintain irrigation. A great irrigation solution for your short vacation. You don't have to worry about watering your houseplants anymore and enjoy a good time for travelling. Easy to use: suitable for plugs with an inner diameter of 20.65mm -22.5mm, such as pepsi, coca-cola, deet cola, etc. Easy to install, just drill a few holes in the bottom of the bottle or cut the mouth of the bottle to allow air circulation. For indoor and outdoor: ideal for vegetables, indoor and outdoor gardens, hanging plants, small trees, shrubs, daily water plants, potted plants, indoor plants, herbs, garden plants, hanging baskets, sinks, etc.< /p>