blumat bottle adapter (12 pack): self watering spikes/houseplant watering stakes, automatic irrigation system, use when on vacation,terracotta spikes to use with recycled plastic water bottles blumat size: 12 pack go on vacation and let blumat bottle adapter look after your plants! blumat bottle adapter stakes ensure a constant water supply by siphoning water from a standard bottle to your plants. forget complicated plant watering system(s) and terracotta watering spikes that fail to work well! the bigger your bottle, the longer you can leave your houseplants without worrying about watering them! this is the only automatic plant watering system you'll ever need. blumat watering system(s) work so well, you'll be content to throw out your old indoor plant watering devices, indoor plant watering system(s), automatic drip irrigation kit(s), glass plant watering bulbs, irrigation bottle(s), and all your other watering gadgets! slow, continual watering encourages prolific growth! blumat stakes prevent underwatering and over watering which stunt growth and squeeze air out of the soil, preventing them from "breathing". the stakes are made of porous ceramic allowing water to seep through it slowly. as moisture levels rise in the soil, it will begin to inhibit the transfer of water, and as the moisture levels drop, it allows water to pass through again. simple setup and maintenance! blumat bottle adapter stakes attach and draw water from any standard sized bottle. soak your stakes in water for 15 minutes, cut the bottom of a pop bottle or any other standard bottle, attach your stake, fill your bottle and then push the stake near the plant in the soil. a plant needs between 1⁄4 and 1 litre of water per week so make sure your bottle is large enough. original blumat technology these are original blumat bottle adapter stakes, specifically designed for houseplants. ours are made in austria. beware cheap, chinese-made water spikes or water bulbs that will let you and your plants down. we stand behind our product 100% and are committed to providing a+ support and customer service! purchase the final self watering system you'll ever need.