If you like a tall cool drink of water, store your drinking water in the refrigerator rather than letting the tap run every time. This will save water from going down the drain and comes with a little $omething $pecial. Keeping water (or other products in the refrigerator) will help it run more efficiently.
Think about this: “Every time you open the door to the refrigerator, you let out cold air and let in warm air–and when you shut the door, all that warm air you let in has to be cooled down. The more air space in the fridge, the more cold air that can be swapped with warm air from the kitchen. More warm air = more cooling required = higher fridge juice consumption = lighter wallet.”