Slow Release Water Automatically: The terracotta watering spikes will release water automatically. Thinner the spikes, faster the draining speed.The plant watering devices is made from terracotta clay. The clay stake is porous. When you put the bottle full of water in the stake, it takes a little while for the water to soak through the porous clay. If the dirt around the stake is dry, the water automatically wicks from the clay into the dirt, and the water keeps wicking out into the dirt until the dirt is saturated with water, or until the bottle is empty.Easy to Use with Long Neck Wine or Plastic Bottle. Firstly, dig a hole in the soil. Secondly, insert the watering stakes into the soil gently. Fill the bottle or wine bottle with water, connect the bottle with stakes and turn upside down.The package includes 6 watering stakes. You could choose used wine bottle or long neck plastic bottle to be compatible with the stakes. The watering spikes are perfect tool for you to recycle the used bottle as well as free up labor.Slow Release Watering Stakes for Vacation Use. There is no standard releasing time for the spikes. Usually 1 Litre of water could water about 7-10 days. It is designed to prevent overwatering and guarantee the watering when people go out for vacation.