1. Versatile and comfortable: Perfect for a variety of indoor and outdoor plants, these reliable spikes ensure your plants stay hydrated even when you're away. The 600ml bottle provides slow watering for 1 7 days, while the 1.5 liter bottle extends the duration to 7 15 days, depending on the selected flow rate. 2. Widely compatible: Experience unmatched versatility with our reliable spikes, designed to fit most standard bottles. This plant watering system is suitable for bottle openings with a diameter of 1.10 1.18 inches. 3. Reduce gardening chores: Free up your time with this automatic watering device, allowing your plants to self water. Spend less time watering and more time enjoying your plants and life. These self watering spikes are suitable for various plants, including vegetables, potted plants, and indoor plants. 4. Science based learning: Turn your space into a natural classroom for children with these innovative spikes. By using atmospheric pressure to precisely regulate water flow, these self watering devices create an interactive learning experience, ing opportunities to explore natural sciences.