OK, I know how to get the egg in the bottle. How do you get it out? Make an omelette?
Or holding a finger over the end of a straw (paper in the olden days) and sticking it in a potato?
Let's admit it. We old timers had loads of fun and didn't need an electronic gizmo for entertainment. We were lucky to have a B&W TV with three channels. No A/C but an oscillating fan in the bedroom.
Actually I know how to get the egg in the bottle, and assumed that was what the photo was trying to show, albeit in the wrong order. (Or perhaps the photo was from the Middle East. Many languages there read from right to left.)
I never tried this. It is just a hunch:
I would try pouring soda in the bottle. Flip it past sideways so the egg plugs the hole, and then give it a little shake. I suspect that the released carbon dioxide would be strong enough to push the egg out. It would be tricky, because if you flip the bottle too much, the egg might try to float on the soda.
I will leave experimental proof as an exercise for you, the student. I would rather turn pens than spend time sacrificing a bunch of hard boiled eggs to test my hunch.
