Don't be a drip about watering!

The Frustrated Gardener has this great idea...

Drip irrigation with mineral water bottle is an easy way of watering plants. No cost involved in making this. No power or piping required for supplying water. It is very easy to make. Take an empty mineral water bottle. Then make 4 or 5 small holes at the bottom of the bottle with a nail. Now fill the bottle with water and screw the cap back on to keep bugs and debris out of the water reservoir. After that insert and fix the it into the soil (approximately 2 inches) in the pot or sack in which your vegetable plants are growing. That’s it. Your drip irrigation with mineral water bottle is ready. Keep the bottle close to a side of the pot. This is to keep a distance from the plant. Water will slowly flow into the soil in the pot and plant will absorb it as and when required. Water does not overflow from the pot by doing this