Bezall 2 Pack Automatic Ceramic Plant Waterers Self Watering Spikes Flowers Drip Irrigation Watering Stakes System Gardening Tools for Indoor & Outdoor The self watering probes are simple and effective ways to water your plants when you are on vacation, business trip or forgetting to water them Made of high-quality Pottery & PP materials, non-friable, durable and convenient. DEVICE PRINCIPLE: as the soil dries, the ceramic cone delivers water gradually into the surrounding earth; Thereby create a vacuum within the cone which draws water from the nearby container of water; Once the soil is moistened enough, the watering stake will cease flowing water Suitable for most plants  Ideal for houseplantspotted plants, patio plants, hanging baskets and outdoor gardens. Spikes Designed to be closer to the porosity of the soil. Suggest that a 6-inch potted is equipped with a plant waterer, and a plant waterer can be added for every plus 2 inches in diameter.