Package includes: 40 drip irrigation bottles + 40 switches Material: PP plastic, convenient and practical. Durable, sturdy, environmentally friendly, reusable, recyclable, and long-lasting drip irrigation in bottles. This product is suitable for bottles with a diameter of 1.1 inches. Adjustable valve: The flow rate can be controlled. The plant watering device with a regulating valve can control the drip rate from 0 to 60 seconds per drip, and the continuous drip lasts for several days. Simply adjust the valve to suit your needs, without complicated setup steps. Save time and water. Easy to use: Drip irrigation bottle, quick installation, no twisting required, just place it on the plant watering can, deliver water directly to the plant roots, suitable for most plants. The flow control ensures your plants receive the right amount of water. Instructions: Prepare a cola bottle, fill it with water, screw the dripper onto the bottle, drill a few more holes in the bottom of the bottle, and