Evelots Plant/Flower Watering Tall Spikes-Plant Food-Bottle Screw-No Tool-Set/10 This set of 10 watering spikes will make watering easy for small indoor and outdoor plants and gardens! Self watering plant irrigation cones allow you to water over time--perfect for short travels, busy seasons, or those who struggle to keep up with daily watering. Watering spikes attach to most water or soda bottles for economical irrigation. Two small holes near the tip of the cones help water drip slowly and consistently over time down to the plants root system. Simple-to-use cones require no special tools. Screw onto a bottle filled with water, invert, and insert deep into soil near plants roots. Can also be used with plant food or fertilizer for slow feeding. Set of 10 blue plastic spikes; each spike measures 7.25 long with a 1 top diameter. Watering bottle not included. Trusted vendor. For years Evelots has provided unique products with a 30 day easy return policy, and 100% satisfaction guarantee.