Gather your supplies.
Crack your egg. I'm not talented enough to do it with one hand but if you are, it will make this trick even more impressive.
Hold your plastic bottle right above the egg and lightly squeeze. When you release the pressure, the yolk will magically slurp into the bottle. It will stay in until you squeeze the bottle again.
Needless to say, we were pretty excited when it worked on our first try.