How to make an air pump using a plastic bottle

In this video, I made an air pump using a plastic bottle and household items laying around.

Things Required -

Plastic Bottle

Balloon

Tape

Scissors

To make this first, poke a hole in the centre of the bottle. Now, in the cap, the bottle pokes the hole in it. Now paste a diaphragm in the cap and then it is ready to use. For directions to use, check out the video given above.