Drippers are used in the watering of gardens both large and small. The idea with drip irrigation (micro irrigation) is to drip water slowly to the plants roots. It is a much more direct way of watering or irrigating and therefore helps to conserve water.
There are many different kinds of drippers available. It’s important to know which kind best suits your needs. Decide the length of time you wish to water for let's say 15 minutes, then you can pick your drippers for the area, pot or tub to give the right amount of water you need.