Self Watering: The plant waterer regulates watering and promotes healthier roots. It makes gardening easier and plants healthier. Perfect Design: The plant spikes fit most water and soda bottles, such as plastic bottles. - You don't need to hire a caretaker to water your plants while you are on vacation. Enjoy your vacation. Suitable for Outdoor and Indoor: Made of high quality ceramic, good permeability and weather resistance, durable for long service life. Extra long stakes for a stable device. Simple to use. Persistent: On average, a stake with a 1 liter bottle will last 5-7 days compared to most other stakes that last 2-3 days. The secret is in the ceramic.