Summarize the following:
To get the pieces of egg back out of the bottle you will need baking soda, vinegar, and a plate. This experiment is essentially the reverse of what you did to get the egg into the bottle. You will increase the air pressure inside the bottle so the egg will get pushed back out. You need about 2 tablespoons (30 ml) of baking soda and 3 tablespoons of vinegar.

Summary:
Gather the necessary materials.