SLOW RELEASE CONTROL SWITCH: the improved adjustable switch does not leak, Control water flow rate, scientific drip design, you can set the flow rate as required SERVICE COMMITMENT: You can contact us if you have any problems with the product, we will provide you with a solution within 24 hours EASY TO USE: without any tedious installation, all you need to do is to cut a hole in the bottom of the bottle and tighten the drip irrigation watering devices, and then insert it into the soil, no need nail and no danger PLANT SELF WATERING SYSTEM: plant watering spikes made of ABS plastic material, eco-friendly and Durable FIT MOST BOTTLE: the Self Watering Spikes are suitable for the bottles of 1.1 inches inner diameter, they are compatible with Dr.pepper, , , Lipton and so on.