[Self Watering Spikes - 8 Pack, 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 ABS material, without holes, you can drill holes with a nail according to your requirement, 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 water spikes are without holes,you can drill holes with a nail according to your requirement. The further the distance between two holes,the faster the speed of watering. 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 8 Pack / Set