Drip design: Automatic plant waterer by spot watering only exactly where needed, making your drip system great for saving water in drought conditions. Adjustable dripping speed: The control valve to adjust and control the dripping speed according to different .The plant watering device with a control valve can control the drip speed 0-60s / 1 drip, and the sustained-release drip lasts 1-15 days. Application: perfect for indoor/outdoor plant or garden, home or office, It is perfect for potted plants, houseplants, patio plants, hanging baskets and many more. Self watering: Automatic plant waterer is a helpful assistant for the gardening, keeping plants healthy by delivering the perfect amount of hydration. Easy to set: Simply drill holes at bottom of bottle or cut it and then the control valve that can adjust the speed of the flow. Suitable bottles: Perfectly fits for all size beverage bottles.Suitable for brand bottles:for .pepper, for , for , for Iced Black Tea, for ,for Deet Cola, for Aqufina or other bottles with inner diameter of 1.1 inches Type: Watering Spikes Colour:Green+yellow Material: PP Size:Length: 13.3cm Package Contents: 12 x Watering Spikes Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.