Bottles are always of different shapes and sizes. And It is not always easy to find the right-sized brush for cleaning out a bottle. But there is a trick that can help in cleaning all kinds of bottles without any need of brush. For this technique you will need egg shells.

Follow these steps:

1. Take an egg shell
2. Crush it into very small pieces
3. Sprinkle some pieces of this crushed eggshell into the bottle.
4. Pour some water into the bottle.
5. Put on the cap, and give it a good shake.
6. Rinse out the bottle.

The eggshell will help clean all the dirt from the inner walls of the bottle