❥【Adjustable Flow Speed】This plant watering spikes with new version slow release control valve switch.Provide different amounts of water for different potted plants or flowers.Unique automatic irrigation valves,watering plants while away,only need to adjust the water flow rate to meet your individual plants need. ❥【Suitable for Most Bottles】 This vacation plant watering system is suitable for almost all of the bottle.Not only the plastic drink bottle but also wine glass bottle.This plant self watering spikes can insert the plant waterer into the bottleneck directly.which can avoid water leakage effectively.If you insert the spikes to the soil vertically,it can bear whole wine bottle. ❥【Design Highlights】 This planter watering spikes no need to drill any holes at bottom of bottle or cut the bottle,no need to find 1.1-inch inner diameter bottles,suitable for inner diameter(0.72-1inch)of the bottle,almost all of bottle can use.Constant pressure design,stable water flow.The valve switch is medium in size and easy to operate.Dust-proof and fully enclosed design will not fall into dust or insects.