The self-watering pot: Through capillary action, a piece of string absorbs water sending it to the soil to keep your plant's soil moist for a period of two weeks, before the water chamber has to be refilled.
I have uploaded the design to Thingiverse, so that you can download a 3D model of the self-watering pot, find a local 3D printing place and have it made.
While working on the Growbot, I wanted to take the self-watering concept a step further and started looking into hydroponics (soil-less farming). The goal was to build a fairly simply vertical garden with regular house items and some IKEA products.
There is a manual below that you can follow to build your own Hydronius, or you could scroll down and see the prototype in action.