Features:Drip Controller:1.The water will be slowly emitted through the device within 15 days, automatically watering your plants.The drip speed is up to you.2.Use easily flow control to make sure your plants watered anytime.3.Simply screw a spike onto a full bottle of water, then insert the pointed end directly into the soil near a potted plants stalk.4.You do not worry about watering your plants when youre away on a short break, this clever device simply attaches to any screw-top bottle and does the watering for you.5.Combine water and plant food in a bottle then use the water spike to deliver the ultimate nourishing fluid.Specification:Material: PPColour: GREENSize:13.5*3cmNote:The controller can be installed on a 2.54cm (1.1 in) diameter bottle.Bottle diameter of 2.8cm or above cannot be installed.Package Included:12 pcs Flower drip spikes GREEN