[6 Pack-Ceramic Self Watering Spikes, Vacation Plant Waterer -] eLander Automatic Watering Spike for Indoor Outdoor Use, Perfect for Vacation Plant Watering and Drip Irrigation Watering FOR LONG TIME WATERING: The probes are made of ceramic material that will keep the watering at a constant speed. Recommended Buying the product one week before your trip so that you can test the watering speed. Note: The watering speed is decided by different soil density, plant water absorption ability and other factor EASY USE, 3 STEP TO START: 1)Prepare a bottle to fill water. 2)Connect the bottle mouth to the connector. 3)Insert the water probes into the soil PROPER FOR MOST BOTTLE: Such as Coca Cola and other plastic bottle drink 6 Pack / Set