I have been quite pleased with the water savings since switching to self-watering containers this year. So far the only water I have used is rain water collected off of our roof into a 32 gallon garbage can. With the weather in the upper 80′s and mid 90′s these past few days, I have had to add water to the reservoirs about every three days. The reservoirs tend to hold about 2 1/2 quarts apiece so it shows that the plants are quite thirsty!