Automatic drip irrigation system DIY Packing: 1set Suitable for use, Coke bottles, Sprite bottles and larger calibers. 18-26mm feature: 100% new high quality. Drip irrigation system with adjustable flow valve, The use of simple and convenient operation will not cause waste of water resources, nor will it affect plant growth due to excessive or too little water 1, you go out, there is no time to water the flowers every day, only the bottle is filled with water, it can automatically water your plants (if you want to travel long distance, you do not know how much water you need to invest for 3 days, you can test how much water, so You can calculate how much water you need. You can calculate the total water demand per day for X days. You can also add water-soluble fertilizers to the water storage container in proportion to water, while reducing the hassle of fertilizer.