Blumat Classic Vacation Irrigation Watering KitNo power, timers, or stressthis automatic system keeps your plants watered while you're away or just too busy. Easily expandable and perfect for stress free, "green thumb" results. Without batteries, timers, electricity, or even a conventional water source, Blumat Classics siphon water from a reservoir into the plant containers. They give the plants water slowly through a porous ceramic cone so you wont worry about squeezing the important air pockets