Automatic irrigation systemsupplies water directly to plant roots, the screw switch design can control the water flow without leaking, the self-irrigation system eliminates the worry of forget to water or unattended. Easy to useSuitable for most bottleswhich have an inner diameter of 20-30mm, for example: Pepsi, Coca Cola. No need to find another bottle to store water. No tedious installation; drill or cut some holes in the bottom of the bottle. MaterialThe new PP material is a thermoplastic resin with excellent properties. It is a colorless, translucent, thermoplastic, lightweight, safe and harmless plastic. Multi-scene applicationIrrigation system It can be used for potting soil, flowers, hanging baskets, herbs, vegetables and many other indoor and outdoor plants for watering, gardens and offices. Self-watering device for vacation necessary. Quality serviceIf you go out often and don't have time to take care of your plants, this holiday plant watering kit is perfect for you. You can rest on vacation and still see intact plants. If you have any questions about the product, please contact us. Product Description Properties: 1. Water pressure is not affected by lowered water level 2. Improved valves regulate drip speed No need to cut bottles or drill a hole 3. Sturdy ABS plastic for long life 4. used for indoor garden, potted plants, houseplants, herbs, etc. Application: Step 1: Insert the control valve into the water supply system. watering the plant. Step 2: Insert the holder into the plant watering device. Step 3: Insert the automatic watering device into the bottles. Step 4: Adjust the nut to control water flow. Step 5: Put it in the ground. Features: Color: green, pink, cream white Material: ABS Quantity: 18 pieces 550ml water supply time approx: 5~7 days 2000ml water supply approx: 7~15 days Scope of delivery: 18 x Drip Irrigation ( three colors) 18 x Valve Switches 18 x Fixings 1x User Manual Note: 1. You don't need to drill any holes in the bottom of the bottle. 2. Not influenced by hydraulic pressure. It can still sink and the water level is low.