1、Practical Tool: The self watering spike is a garden watering device, a very convenient tool that helps deliver water to plants where they need it most. 2、Easy To Use: Simply screw the head of the self watering spike into a full bottle of water and insert the tip directly into the soil near the stem of a potted plant. 3、Delivers Nutrients: You can mix water and plant food in one bottle and then use the drip irrigator to deliver the ultimate nourishing solution. 4、Application Scenarios: These irrigation spikes are suitable for vegetables, potted plants, houseplants, patio plants, table pots, outdoor gardens and more. 5、Wide Application: Automatic watering spikes have a top outer diameter caliber of 2.1cm and are suitable for most cola bottles, mineral water bottles, beverage bottles.