John from http://www.growingyourgreens.com/ sets up the largest self-watering containers he has ever found. They can last up to a month between watering. In this episode, John sets up the Aqueous and Oasis Commercial Self-watering planters that is like a self-contained raised bed. You will discover what sets these self-watering containers apart form others that are currently on the market, and how easy they are to set up and grow edible vegetables in.
Here are the planters from the video: