How to use atmospheric pressure to drop an egg into a bottle? And how to make the egg spit out of the bottle?

How to use atmospheric pressure to drop an egg into a bottle? And how to make the egg spit out of the bottle?

Light a piece of cotton soaked in alcohol, put it into the bottle, and put the shelled cooked egg at the mouth of the bottle. After a while, the flame goes out, the bottle cools, and the air pressure inside decreases, and the atmospheric pressure will press the egg in
Turn the bottle upside down, the egg is at the mouth of the bottle. Pour hot water on the outside of the bottle, the air inside expands, and the egg spits out of the bottle