Adjustable ValveThis holiday slow drip irrigation flower pot waterer with adjustable valve can control the drip rate between 0-60 seconds, dripping freely. It usually slows down over time, so you can test it a few times before getting the best results. Don't worry about your plants wilting while traveling for business or vacation.Easy to UseThe plant self-watering insert with stand is made of high-quality ABS plastic. There's no complicated installation required, you simply use our in-house mounted tools to drill holes in the bottom of the bottle to allow air flow, then insert these self-watering devices into the soil.Suitable for 500ml BottlesThe indoor waterer fits bottles with an inner diameter of 1 inch/2.5 cm. We recommend the 500ml bottle for indoor and outdoor plant watering spikes, better suited for standing upside down. (Please measure the inner diameter of the bottle before installation, including thread size).Eco-friendly and DurableThe plant watering equipment is made of high-quality plastic and can be reused. This watering can is suitable for outdoor plants, has high strength and toughness, good heat and cold resistance, is safe and durable. Recycle plastic bottles efficiently. Reduce waste and protect the environmentWide ApplicationThis vacation plant irrigation system is suitable for small potted plants, indoor plants, patio plants, hanging baskets, deck pots, hanging plants, etc., providing different amounts of water to different plants and flowers. We recommend using it according to your potting water needs.