1.Reduce your gardening work: Free up your time with this automatic watering device, so your plants can selfwater. Spend less time watering and more time enjoying your plants and your life. These selfwatering plant inserts are suitable for various plants, including vegetables, potted plants, houseplants, etc. 2.Nature science research: Transform your space into a natural classroom for children with these selfwatering spikes. By using atmospheric pressure to precisely regulate water, these selfwatering spikes promote an interactive learning experience and open opportunities for exploring natural sciences. 3.Widely compatible: Experience unmatched compatibility with our selfwatering spikes, designed for most bottles on the market. This plant watering system fits bottle openings with a diameter of 1.101.18 inches. 4.Versatile and convenient: Perfect for a variety of indoor and outdoor plants, these selfwatering spikes ensure your plants stay hydrated even in your absence. The 600ml bottle provides slow watering for 17 days, while the 1.5liter beverage bottle extends the duration to 715 days depending on the selected speed.