Your water Display will show you how much water you are using right now (the drips from the tap represent this) and how much it has cost you (32p in the example below).
It will allow you to tell it how many people live in your house, you can then challenge yourselves to see if you can beat the target. This would be represented by the beaker; if you do not use the expected amount the beaker will never be completely full.
If you use more, the beaker will overflow and you will see puddles.
After 7 days the Water Display will start to show Fish to represent if you are above or below your target for the period (today, last week or last month)