1.Reduce your gardening: yourself your time with this automatic watering device, so your plants can be selfwatered. Spend less time watering and more time to enjoy your plants and life. These selfwatering planter inserts are suitable for various plants, including vegetables, potted plants, indoor plants, etc. 2.Widely used: Experience unsurpassed compatibility with our spikes that are available on the market for most bottles. This plant watering system is suitable for the bottle opening of 1.101.18 inch diameter. Note that using other bottles may lead to leakage due to incompatibility with the thread. Ensure a secure fit with the specified bottle types. 3.Versatile and comfortable: perfect for a variety of indoor and outdoor plants and these spikes ensure that your plants stay hydrated even when you're absent. The 600ml bottle provides slow watering for 17 days, while the 1.5 litre drink bottle extends the duration to 715 days depending on the selected speed. 4.Science Research: transform your space into a natural classroom for children with these tips. By using atmospheric pressure to precisely regulate water, these selfwatering spikes promote an interactive learning experience and open up opportunities for exploring the natural sciences.