I half expected these things not to work and out plants would be dead after returning from a holiday vacation. Surprisingly, as simple as these are they worked great. Plants kept with constant moisture. Now we leave them in all the time and just refill the vases. Someone should make a tank that can clip on the outside of the pot. Only note is that you need to fill the ceramic plug completely full with water and immerse the tubes to ensure the capillary action works to pull water into the spike.